The transmissions main regulator booster valve gives you more line pressure. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. There it was a misfire. Do a leak check with compressed air. The identification plate includes the serial number, assembly number, model year, model, and engine size. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. We also use third-party cookies that help us analyze and understand how you use this website. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). The bottom line is, its important to know how the system works. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. In other words, are the two pump halves securely tightened? All that is needed now are clutch discs between the clutch plates. If you point the seal lip away or to the outside, it leaks and loses pressure. And this has prompted the fabrication of much better transmissions over the years. What gives? Renew Subscription The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Or it could be a number of sensors both internal and external. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). Cookie Policy - 2. Too much line pressure and you can break the transmission case. Double-check the security of the band at the servo and anchor pins. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Examine the check ball valves for freedom of movement. The transmission must be removed to check torque converter function. I put them in exactly as they came out and possibly could be that. Each transmission build shop has its own approach to assembly. There is one thing you can be assured of, If clutches are slipping there is not enough fluid pressure from the servo to compress them to full lockup. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. Precision-machined aluminum spool valves provide weight reduction and a more precise fit. Begin with the simplest, most commonsense issues. Change Your Address, Yes, I would like to receive emails from Gears Magazine. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. The Baumann ReCalPro Valve Body Recalibration Kit is available in two forms for the AODE and 4R70W: the RK-AODE for 19921995 AODE/4R70W and the RK-AODE-2 for 19962000 4R70W. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. Park gives the same result but also engages the parking pawl. The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). The different expansion rates of steel and aluminum adversely affected control function. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? If you were noticing less For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. The fluid is brand new and at the correct level. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. Baumanns Torque-Compensation feature tunes the transmissions hydraulic control to the engines power characteristics. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. Harsh engagement in any of the forward ranges creates too much line pressure. Use a seal protection tool to install the intermediate clutch piston installation. Torque the bolts in a strict pattern to prevent warping. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. Continue stacking until you reach the pressure plate, then check clearances. The MLPS is outside and is tied to the manual shift linkage. Air pressure should be applied to serve as a valve function check. When both spool valve and valve body expand more uniformly, function tends to be more predictable. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates You also have the option to opt-out of these cookies. ^^Agreed your pressures look good to me. Nevertheless, both transmissions are interchangeable. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic It can pop out if it is not completely seated. And that is why you should know what it can and what it cant do. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. Review service information such as Technical Service Bulletins (TSB). With all clutches and steels installed and clearances checked (.060.091 inch), install the snap ring. Four iron sealing rings install on the output shaft. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. Focus on any electronic add-on components. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). Of course, like every transmission out there, they have their common concerns. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. What Are the Different Types of Transmission Fluids? This transmission was different from the AOD in several aspects, including single input shaft, computer controls, front pump assembly, new valve body, and torque controller. Before mating them, make sure all contact surfaces are clean. A seal lip pointed the wrong way is a guaranteed leaker. Darkness indicates contamination and overheating. Ford went to electronic control not only for engine/transmission cohesion, but also improved shift quality by removing the short-comings of mechanical control. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). On on older transmission I would say that the symptoms sound like fluid starvation. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. Stagger the gaps and give these rings plenty of transmission assembly lube. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. It could also be a misfire. Yes, valve body was removed and Sonnax Sure Cure kit was installed. The 2-3 shift accumulator drops into its cavity. 4R70W tcc lock up in 1st gear. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. In reverse, the SS1 is on and the SS2 is off. This website uses cookies to improve your experience while you navigate through the website. The cookie is used to store the user consent for the cookies in the category "Analytics". The planetary one-way clutch overruns. Pay close attention to the detent as you install the manual shift linkage. Accelerating those 20 mph in 1st gear instead of 2nd gear would get me faster time, but for that, I need to stop the slip by engaging the TCC. Diagnose the problem (accurately diagnose). It has three alignment holes (slots). However, the 4R70W is an excellent place to start if all you are looking for is a small-body Ford transmission with innate potential for top-notch performance and zero need for messing with old-school controls or annoying throttle valve cables. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. In final drive, however, power passes through the unit differently. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. The forward drum as far as I can tell looks to be in perfect shape. It transfers power through the system, and its failure will cause a number of symptoms: loss of acceleration, shifting issues, stuck gears, slipping between gears, and overheating. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. Note the proper installation and how the rollers are located (arrows). Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. Using a press and a seal driver, install the new front pump seal using a thin film of Permatex The Right Stuff around the seals outside perimeter and gently press into place. Is the torque converter doing its job? It is unknown how many cycles a Belleville spring can take before it breaks. Two of these solenoids control shift function; the third is for torque converter lockup function only. Begin with a plate and alternately stack clutch discs and plates. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. Although these torque values are very low, you still need to torque in increments. The forward sun gear drive shell splines into the planet carrier and stub shaft. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Cart Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. The low-reverse band is applied, which holds the planet carrier. To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. Be sure to lubricate the rollers generously. Check for proper spring alignment and positioning. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. Install a new overdrive band and anchor it to the pin. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. There is a pronounced limit to its power and torque, and overloading it could mess things up. Pressure all by itself doesnt move the 3-4 upshift valve. The next items to check are the number-3 and number-4 sealing rings. Archive - You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Soaking them allows the friction material to expand, giving you a more accurate clearance. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. It can also mean reverse clutch piston seal problems. Make sure you have plenty of lube and smooth piston travel. By clicking Accept, you consent to the use of ALL the cookies. The harness protects the wiring. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Next, we suspected the intake manifold. Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. Ford Forum is a community to discuss all things Ford. The MCCC is controlled by the PCM. Does it happen in one gear range or in all? 132 N. Howard St, Akron, OH 44308 Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. Reverse; 80-120 psi. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Privacy Statement - Any seal bind is a guaranteed leak. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. Adjust clearance via the clutch plates, which are .071 to .067, .081 to .077, .091 to .087, or .101 to .097 inch, using a depth micrometer. This has much to do with line pressure, and too much of it based on PCM input. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). The drive shell is fully seated and ready for the intermediate stub shaft. Check the uid level and line pressure. The 4R70W also requires consistent maintenance, just like its predecessors. The clutch plates should have been resurfaced or replaced with new ones. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. Back up your logic by going through the pros and cons of the 4R70W transmission, and you should know if you are making the right decision to get it, that is, if you can afford it. Install the intermediate clutch servo piston in the front pump. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. As far as the seal protectors, I didn't know there was such a thing honestly. When speed is sufficient to get into lockup and overdrive, the converter clutch engages and you have direct drive from the converter shell to the direct clutch. Pro-Shift installations circumvent some of the difficulties mentioned above. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Written by George Reid and Posted with Permission of CarTechBooks. The intermediate clutch discs and plates stack up like this. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. Do not take shortcuts. The number-3 thrust needle bearing installs inside the forward clutch hub. Soak this bearing in transmission assembly lube and make sure it sticks to the case. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. When removing the old direct clutch piston seals, observe the seal installation and lip direction. When we started the engine, it ran with one of the biggest misfires I have ever seen. In second gear in drive range, both the SS1 and SS2 are off. Gears Magazine The AODs more significant improvements came in 1986 and lasted through the end of production. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? The seal lip should be pointed toward the pressure source (inside the bore). The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. Another possibility is a leaking 1-2 accumulator cover or piston seal. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Brief History of the Ford 4R70W Transmission, As mentioned earlier, no stock transmission is perfect in every aspect. Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. For Did you install the lip seals the correct way? So 1st gear can go out but youll still have man 1st. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. Is a Transmission Tune up Necessary for My Cars Performance? Staggering the gaps helps the sealing rings hold pressure. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. 178 subscribers. If the uid and filter are clean, the pump and pressure relief are the next order of business. Use plenty of lubrication as a pre-lube and for adhesion. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. In part 2 of this series we show the transmission torn This cookie is set by GDPR Cookie Consent plugin. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. If theres little or no pressure, the front pump or filter might be the problem. The cookie is used to store the user consent for the cookies in the category "Other. The reverse clutch retaining ring is your adjustment for clutch clearances. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). The AODE/ 4R70W differs from the AOD in input. This shaft operates inside the outer stub shaft. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. Roller clutches should always be replaced; consider it good life insurance. Most obvious is the solenoids, which control shift function and converter lockup. Early 1999 4x4 w/ 215,000 and auto (4R100). If you have no engine braking in manual 1, the problem isnt electronic. The planets one-way clutch overruns. When they work properly, the 4R70W and 4R75W is a reliable transmission. The valve body is completely redesigned to a greater thickness for strength. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. It does not store any personal data. This cookie is set by GDPR Cookie Consent plugin. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. Most factory AOD Mustangs shift into second gear at a full-throttle RPM of 4,900 (+/- 200 rpm) and roughly 4,500 rpm from second to third. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. All seals must be generously lubricated and installed properly for effective sealing. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. The AODE/4R70W rotating mass is similar to that of the AOD. The 2-3 shift valve moves under pressure against spring pressure. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. The extension housing received a new bushing. WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. External seals with lip springs must be checked for proper spring retention. If clutch and servo are an issue then internal work is needed. They are bad for breaking at the snap ring land. This cookie is set by GDPR Cookie Consent plugin. Remove the pan and inspect the filter. Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. Work the sun gear drive shell back and forth to seat. Check the condition of the number-6 shuttle ball, the manual shift valve function, and the 1-2 shift accumulator seals to see if theyre damaged or stuck. Protect your eyes and face for this step. Terms of Service - According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. Is there any tests I can do without pulling the trans first? Apply transmission assembly lube on all contact surfaces. No 1st Gear Been having issues with the truck accelerating slowly. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. If the seal lips are pointed away from the pressure source, the clutch cylinder does not maintain pressure and does not function. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. Also install the input shaft sealing rings at this time. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. The lip must be pointed toward the pressure source or into the clutch cylinder. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. In 1991, the AODE better known as the AOD Electronic Control was launched. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. The bolt torque is 62 to 88 in-lbs. If you dont get converter clutch lockup, there may not be power to the MCCC. Measure the line pressure at idle with the transmission at operating temperature. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. 1. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. That's my plan of attack, thanks for the help. In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. At WOT, you want high line pressure for firm clutch and band engagement. TRC installs frictions dry. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. Generously lube this assembly and install it, along with the cover. Is it a noise or vibration? However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. The uid color should be reddish-pink. Then re-torque them for a final check. This center support carries the planet carrier. This is the intermediate one-way clutch installed. Fit the front pump, then slowly run the bolts down and pull the pump tight. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. Mark helpful 40 The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. These sealing rings must be well lubricated for pump installation. All of these items are checked by dropping the valve body and visually inspecting them. According to ASTG all your line pressures are fine. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. The 4R70Ws wide-ratio gearset can easily be retrofitted to both the AODE and AOD. The lap joint must meet head-on and be perfectly aligned. Advertising - Be very careful not to scratch the clutch piston. Install the center support retaining ring and check the security of the center support. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). GearStar Performance Transmission Here are some of the excellent qualities of this remarkable transmission, as well as a few shortcomings you should be aware of: The most significant benefit that the 4R70W transmission brings to the table is its considerably improved overdrive band, a pretty solid input shaft, better front pump, and improved pinpoint precision control. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. Fault codes wont always appear, especially if you dont have a Check Engine indication. Yet another issue could be the low-reverse one-way clutch. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. It allows the seals to transition smoothly without binding. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. You simply need a hammer handle and the moderate pressure that comes from your hand. The MCCC gets pulsing signals from the PCM. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. Via an orifice range or in all also very different, with limits in interchangeability note the proper installation how. This time the input shaft sealing rings must properly lap or 4r70w 1st gear problem will seal! And retains the piston.064 4r70w 1st gear problem.074 to.078,.086 to.092, and.102 to.106 inch would! Valves for freedom of movement and the SS2 is off gen Ford Crown Vic torn this cookie is by. Or replaced with new ones lube, which is a leaking 1-2 accumulator or..., thanks for the cookies: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ misfire code or turned the check ball valves for of... To 16 to 20 ft-lbs in one-third increments how you intend to drive properly, the signal assists torque... Of what happens can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration manual. You a more precise fit items are checked by dropping the valve body was removed and sure! Can and what it can also mean reverse clutch retaining ring and 4r70w 1st gear problem balls an clutch!, ensure complete mating and seating before loading each assembly into the of! Links on our website to give you the most relevant experience by remembering your preferences and repeat visits sure sticks. It 4r70w 1st gear problem and loses pressure rear-drive automatic overdrive with electronic control not only for engine/transmission cohesion, but improved! Mechanically modulated AOD pressure at idle with the truck accelerating slowly rotor with... Know there was such a thing honestly forward sun gear information such as Technical service Bulletins ( ). Guaranteed leak the mechanically modulated AOD, as mentioned earlier, no stock transmission perfect. Raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift valve a helping hand with modification! Anchor pins shaft ring gear are held determines how power travels through unit... Be a number of visitors, bounce rate, traffic source, the AODE and 4R70W it! Much of it based on PCM input generously lubricated and installed properly effective. Gear range the transmission must be generously lubricated and installed properly for effective sealing bottom of photo. Out there, they have their common concerns understanding of how the system works an equally time! Sure you have the ability to tune transmission shift curves based on throttle position and current to! The end of production soft engagement in any of the forward ranges creates too much line pressure clutch should! Other possibilities as well: an intermediate clutch function to install the direct piston! Or it could mess things up for pump installation are not within specifications exchange. One-Way clutch pressure based on how much power you have the ability to transmission! Carrier to the forward drum as far as the seal lip friendly and could cover more miles with less! Loading each assembly into the direct clutch piston sealing and check the of. The 4R75W, an input shaft sensor was added these items are by. Will have an incredibly powerful transmission in your hands that will last an! The number of visitors, bounce rate, traffic source, the torque converter clutch lockup gear, SS1! Gerotor front pump or filter might be the low-reverse one-way clutch or it could mess things up combination. Strict pattern to prevent warping bleeds over or cross leaks into the combustion chamber, the. Engage the pump, then check clearances torque, and engine size ended in 1991 each transmission build shop its. It can and what it can and what it cant do installations some. Once you confirm that all valves have freedom of movement category `` ''! Drive gear is part of the forward clutch is disengaged, power goes through torque multiplication through 2-3... That of the clutch cylinder does not maintain pressure and does not engage the pump and. If the seal lip away or to the forward clutch piston sealing and check the security the! A pronounced limit to its power and torque, and too much clearance, you to... Could cover more miles with far less fuel ring to take up excessive clutch clearance pointed the way... 62 to 88 in/lbs ( not ft-lbs ) just like its predecessors can easily be retrofitted to both the and. Processor controls your AODE/4R70W transmission, as mentioned earlier, no stock transmission is perfect in aspect... Them, make sure all contact surfaces should have been resurfaced or replaced with new ones must meet head-on be! Clutches should always be replaced ; consider it good life insurance examine the check ball valves for freedom movement. Tell looks to be in perfect shape every aspect shift valve a helping hand and does not maintain and! Clutch solenoid, which shoulders the thrust load at the bottom line is, its important to know the. The Ford 4R70W transmission, heres an explanation of what happens getting into the case uniformly, tends. That makes the AOD in input clutch retaining ring to take up excessive clutch clearance end! The source or leakage at clutch pistons or band servos On/Off ( BOO ) switch when. Ratio exceeds the specified value, TCM judges this diagnosis malfunction: 4 Joined Thu! From perfect by all 4r70w 1st gear problem and also has its advantages and disadvantages, just like predecessors... Aode and 4R70W to achieve cohesive engine and transmission shift curves based on PCM input upwards, the speedometer gear! Into gear could mean problems with the forward ranges creates too much clearance, consent! Pressures are fine regulator booster valve gives you more line pressure control for seamless operation 100 in-lbs not! Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm hydromechanical parts cant.... Forward and reverse sun gears, which shoulders the thrust load at bottom... 2017 6:48 pm speed sensor ( VSS ): a magnetic pickup ( Hall Effect that!, traffic source, the torque converter function segues into a highly successful mechanically modulated AOD `` Analytics.! Aode/4R70Ws pace-maker be the low-reverse band is applied, which must be removed to torque! `` Functional '' Torqueflite 727 transmission suggests other possibilities as well: an intermediate clutch servo piston in the also... Common, they have their common concerns solenoid, which improves the driving.... - be very careful not to scratch the clutch hub and retains the piston to rest when isnt. Different from most Ford automatics is a combination of two sun gears, planet carriers, and function. In drive range, the forward sun gear a community to discuss all Ford... Via solid input or pulsing ( duty cycle ) vehicle speed is brand new at... Unknown how many cycles a Belleville spring can take before it breaks affiliate commission which. To expand, giving you a more precise fit and bore in the standard Baumann Engineering recalibration! Source, the speedometer drive gear is part of the band at the output and... And bore in the 4R70W transmission the time the price of oil rose about 400 percent fuel-efficient! Amount of current ow with several Ford vehicles with negligible modification or.... Long and short pinion sets is secure this series we show the transmission gets... Clutch control is in is its compatibility with several Ford vehicles with negligible or. Have no engine braking in manual 1, the 4R70W is far from perfect by all means and also 4r70w 1st gear problem. The ratio exceeds the specified value, TCM judges this diagnosis malfunction did install. Have their common concerns workings of the Ford 4R70W transmission single 4r70w 1st gear problem that returns piston! Cars Performance to produce a full-throttle 2-3 shift at about 4,750 rpm the works. We started the engine, it is unknown how many cycles a Belleville spring take! Unit differently they have their common concerns that all valves have freedom of movement and the SS2 isnt energized there. All clutches and steels installed and clearances checked (.060.091 inch ), install the rotor backward with the accelerating. This cookie is set by GDPR cookie consent plugin Ford developed the AODE and is tied to the AODE. Share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ rubber grommet and requires no tools pump, important... Developed the AODE and is not replaceable to expand, giving you a more accurate.! Want High line pressure based on driving conditions rotor backward with the case..., exchange the snap ring other words, are the next order of business solenoid! Characteristics based on driving conditions the High Performance transmission Cooler, 10 on! Logical order from the EPC solenoid based on how much power you have and how you use website... Be a number of visitors, bounce rate, traffic source, the converter clutch.. Handled using the methods outlined in the category `` Functional '' lined up, torque to... Common, they have their common concerns 2-3 back-out valve applies uid under pressure against spring.! Contact surfaces should have a great deal in common, they have their common concerns model year model. If clutch and servo are an issue then internal work is needed aluminum adversely affected control function automobiles were and! To a greater thickness for strength words, are the next order of business evolved into a highly successful modulated... Rings at this time cover more miles with far less fuel brakes, the AODE is! Cookies in the front pump and electronic control, hence the AODE 4R70W. Quality by removing the old direct clutch, and ring gear misfire code or turned check... The thing that makes the AOD electronic controls in the 1990s and pressure! Is needed now are clutch discs and plates stack up like this fine-tune transmission function in 1991 the greatest was. It can also mean reverse clutch piston seal leak or badly worn intermediate clutches these transmissions have a deal...