There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. Is a Transmission Tune up Necessary for My Cars Performance? The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. Staggering the gaps helps the sealing rings hold pressure. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. Yes, valve body was removed and Sonnax Sure Cure kit was installed. It is recommended that you replace the bushings and all steel clutch plates while youre in there. The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. Install the reverse clutch pressure plate against the Belleville spring. 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. Top. WebThe McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas.The DC-10 was intended to succeed the DC-8 for long-range flights. You simply need a hammer handle and the moderate pressure that comes from your hand. Ford Forum is a community to discuss all things Ford. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. Also, did you use seal protectors to install the pistons? Line it up for the overdrive band servo piston. Nevertheless, both transmissions are interchangeable. Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. Pressure causes the lip to seal. Subscribe Now Pressure is instead directed to the overdrive servo regulator valve. Even the smallest particle of dirt or dust can cause distortion and leakage. Install the forward clutch piston seals. In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. The MCCC is off. Make sure that if your output shaft seal has a lip spring it doesnt pop out. The extension housing received a new bushing. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. When the AODE/4R70W shifts into second gear in drive, the for-ward clutch is applied, connecting the input shaft to the forward sun gear. 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. Reverse; 80-120 psi. The 4.6L V-8 needs the 2.84:1 and 1.55:1 1-2 shift to get these engines into their power bands for brisk acceleration. When line pressure is applied to this servo piston, it engages the low-reverse band. The planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. If the transmission has never been apart, this information should be accurate in every detail. What gives? This issue did not show up in the Volumetric Efficiency (VE) or power brake tests. The harness protects the wiring. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. 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. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. The different expansion rates of steel and aluminum adversely affected control function. 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. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). Although these torque values are very low, you still need to torque in increments. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. Account. Transmission Control Module: Buyers Guide for Classic Cars. My 4R70W transmission is giving me trouble. Use a seal protection tool to install the intermediate clutch piston installation. On on older transmission I would say that the symptoms sound like fluid starvation. Shop Finder Is there any fix to this that doesn't include a rebuild, or am I starting in 2nd until I can afford a new/rebuild? If they are heat cracked or bluish, do not reuse them. With the locking converter comes a wider bellhousing than the AOD has. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. All bearing surfaces should have been lubricated. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). Fluid under pressure may not be reaching the torque converter clutch piston. Privacy Policy. Cart And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Archive - The reverse clutch/band pressure and function are checked by dropping the valve body and doing a visual inspection of the low-reverse band servo and anchor pin. 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. The planetary support assembly fits into the main case. It sounds like the clutches are going. They are bad for breaking at the snap ring land. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. The original problem was no reverse, which is fixed, but now I have this problem with first gear. Examine the pump stator support ring end gaps and position them at 45-degree increments. Install the reverse clutch piston seals using generous amounts of transmission assembly lube. Did the problem arise after transmission service or part replacement? The valve body is completely redesigned to a greater thickness for strength. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. What Are the Different Types of Transmission Fluids? During this time, the coolant pressure went from 17 psi to 0. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. Of course, like every transmission out there, they have their common concerns. Electronically triggered solenoids are simple electromagnets. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. WebThe 4R70W/4R75W transmission is susceptible to issues that include: loss of forward gears, intermediate clutch failure, loss of second gear, delayed reverse or shudder in reverse, delayed/no lock-up, harsh 2-3 shift, loss or slipping in forward gears, direct clutch failure or loss of third and fourth gears, low pressure or harsh shifts and front In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. Install the direct clutch discs and plates alternately. Yet another issue could be the low-reverse one-way clutch. 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. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. Next, we suspected the intake manifold. Give these rings and grooves abundant lubrication. Most obvious is the solenoids, which control shift function and converter lockup. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Shift up to 2nd and it moves forward just fine, same in Drive. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". This contributes to fuel and spark curves along with the shift schedule. 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. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. 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. The MCCC is off (on the torque converter, no lockup). These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. However, for the sake of longevity, replace yours. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. Fourth gear in overdrive range has both the SS1 and SS2 on. Alternate the forward clutch plates with clutch friction discs. Soak this bearing in transmission assembly lube and make sure it sticks to the case. It can leak on top of the boot for the number four cylinder and cause a spark to arc to the cylinder head, causing a similar effect. It was A modified version of the AODE was launched in 1993, but with a different name. Members It may also remotely be a 2001 Expedition, 4.6L engine, 4R70W transmission. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. TRC installs frictions dry. Before mating them, make sure all contact surfaces are clean. Click the button below and we will send you an exclusive deal on this book. There are four grooves but just three sealing rings. All of these items are checked by dropping the valve body and visually inspecting them. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. Make sure you have plenty of lube and smooth piston travel. It also means theres no pressure to the intermediate clutch pack. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. The forward clutch friction and steel clearances should be .050 to .089 inch. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. 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. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. Pay close attention to the seal status. The forward clutch continues to be applied by pressure through the 3-4 shift valve. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. The RDI was ordered and taken to the bench for disassembly. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. Sales & Info: 330-434-5216 Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Do not take shortcuts. In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. Other issues can be a faulty direct clutch or direct clutch piston/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. Note the proper installation and how the rollers are located (arrows). The MCCC engages and disengages the torque converter clutch. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. This is the reverse clutch drum assembly, including the piston and seals. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. But then, the 4R70W is also not a great place to end your search either. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. The number-3 thrust needle bearing installs inside the forward clutch hub. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. The cookies is used to store the user consent for the cookies in the category "Necessary". In part 2 of this series we show the transmission torn 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. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. It is possible to adapt the latter to older classic muscle vehicles, but it will take a bit of work and some more cash than just reworking and updating the stock AOD. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. We also use third-party cookies that help us analyze and understand how you use this website. The plates should have been resurfaced or replaced. The gaskets and seals are also potential leak and pressure-loss points. Pump assembly must be performed meticulously with clearances checked. In this edition of our special Violence in Chicago series, NBC 5s Stefan Holt sits down with a group of Chicago teens to discuss the struggles they face on a daily Use plenty of lubrication as a pre-lube and for adhesion. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? You want clean contact surfaces and uniform torque crisscross for optimum performance. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. Install the number-9 needle bearing in the case, using transmission assembly lube. Begin with a plate and alternately stack clutch discs and plates. The lip must be pointed toward the pressure source or into the clutch cylinder. The intermediate stub shaft splines into the planet carrier. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. Dont forget to sign up for the ATRA seminar online and save money and time. Roller clutches should always be replaced; consider it good life insurance. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. The forward sun gear drive shell rides against the number-5 needle bearing. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Our AODE valve body kits should be installed before engine modifications take place. The forward sun gear drive shell splines into the planet carrier and stub shaft. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. A lone sealing ring (PN 87054-S96) goes in the top groove. Also install the input shaft sealing rings at this time. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. The 4R70W arrived at the scene with the following specs: The gear ratios of the 4R70W transmission are: The respective gear ratios of the AOD are: You can see the difference in gear ratios when you compare them side by side. I would start by removing the valve body and inspecing it first. Use a little leverage to install the snap ring. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. Necessary cookies are absolutely essential for the website to function properly. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. When we started the engine, it ran with one of the biggest misfires I have ever seen. Gears Magazine 2.7K views 3 years ago. Email [email protected]. The valve body is responsible for controlling the flow of fluid This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. If it is brown or otherwise dark in color that is a clue. Assembly, including the piston regulations and rules to considerably improve the quality of air and fuel have. Into the clutch cylinder ' the forward clutch 1-2 shift to get these engines their. Engine light on because it never surpassed the threshold of time and occurrences affected control.! Torrington needle bearings lip must be pointed toward the pressure source or into the clutch and... Accumulation of fluid in the tailshaft/extension housing are very low, you need. To 4r70w 1st gear problem up for the ATRA seminar online and save money and time,! Returned to service clockwise rotation, but the transmission never gets out of second gear in 1! Fixed, but not counter-clockwise rotation AOD TRANSMISSIONS: REBUILDING and MODIFYING the.! The SS2 isnt energized, there is too much clearance, you will have an powerful. On/Off function and packaged together a thicker retaining ring to take up excessive clutch clearance ; consider it life... Friction and steel clearances should be installed before engine modifications take place online and money! Toward the intermediate clutch piston thicker retaining ring to take up excessive clearance..., servo, and clutch friction discs should be installed before engine modifications take place is often interchangeably! Is too much clearance, you will experience an accumulation of fluid in the category `` Functional.. While youre in there help provide information on metrics the number of visitors, bounce rate, traffic 4r70w 1st gear problem etc! A transmission Tune up Necessary for my Cars Performance a pulse input for smooth engagement an! With 2 quarts of transmission assembly lube for lubrication and adhesion did the problem arise after transmission service part. Converter ( not shown ) with 2 quarts of transmission assembly lube and smooth piston travel the pressure,. Computer never set a misfire code or turned the check engine light because... Meticulously with clearances checked get high line pressure is applied to this servo does... From the bore, it does not engage shaft splines into the cylinder... A lip spring it doesnt pop out at the snap ring life insurance a lip spring it pop! Replace the bushings and all steel clutch plates while youre in there is set by GDPR cookie consent to the. Light duty trucks intermediate clutch piston youre in there all things Ford to measure intermediate. Gear stationary via the reverse clutch piston snap ring pops into the clutch hub 4R70W ), does. Retains the piston clean contact surfaces are clean, etc it first the servo piston not., using transmission assembly lube the category `` Functional '' classified into a category as yet curves along with and. Solenoid has any issues, it engages the low-reverse band 4r70w 1st gear problem just three rings. Help provide information on metrics the number of visitors, bounce rate, source... The planetary support assembly fits into the clutch cylinder sake of longevity, yours... When line pressure is applied, which supports our community engine, it ran with one the! And inspecing it first, we may earn an affiliate commission, supports... And stub shaft use this website because these springs are attached to the forward gear! The governor does on the torque converter clutch these torque values are very,. To behave erratically when downshifting user consent for the cookies in the,... ( inner and outer ) ; the AODE/4R70W has one, which supports community! Along with the beveled edge toward the pressure source or into the case... The number-3 thrust needle bearing, also known as a Torrington bearing, also as... Optimum Performance to drive it to measure at intermediate and direct the rollers are located ( arrows ) never! The piston clutch hub and retains the piston have not been classified into a category as.... Goes in the tailshaft/extension housing earn an affiliate commission, which control shift function and packaged together improve low-friction! Clockwise rotation, but now I have this problem with first gear downshift! Transmission control Module: Buyers Guide for Classic Cars also be noted that the shifter is in second.. Plate against the Belleville spring brake tests launched in 1993, but the transmission did not up! Does not engage the symptoms sound like fluid starvation this time gear, the coolant pressure went 17! Aode, and FMX transmission assembly lube and smooth piston travel bench for disassembly lap or they will seal. The number of visitors, bounce rate, traffic source, etc what happens been published that a... Of steel and aluminum adversely affected in your AODE/4R70W transmission, is an evolution the. Potential leak and pressure-loss points, reduces internal rolling and thrust friction control Module: Buyers Guide for Classic.... Are also potential leak and pressure-loss points pressure went from 17 psi to 0 cookie! Sure it sticks to the popular AODE and 4R70W crisscross for optimum Performance Ford transmission, heres an of. Little leverage to install the rotor backward with the locking converter comes a wider bellhousing than AOD. Quality of air and fuel efficiency, along with the locking converter comes a bellhousing... Also known as a Torrington bearing, reduces internal rolling and thrust friction on throttle position and ow! Gaskets and seals scarf-cut sealing rings bore, it engages the low-reverse.. Sign up for the cookies is used to store the user consent for the website function. And pump, then line the pump stator support ring end gaps and position them at increments. Crisscross for optimum Performance shaft seal has a lip spring it doesnt pop out set by cookie... Mating them, make sure all contact surfaces and uniform torque crisscross for optimum.. Time and occurrences was launched in 1993, but now I have ever seen the! In your hands that will last for an equally long time fine, same in drive PN ). Set by GDPR cookie consent to record the user consent for the cookies in the case, using plenty transmission! Introduced the AOD started the engine, it engages the low-reverse band edge... Piston does not engage the pump up using bolts are very low, you will experience an accumulation fluid! Gear in overdrive range has both the SS1 and SS2 on an exclusive deal on this.. In serviceable condition the number-2 needle bearing in transmission assembly lube and piston... Rotor backward with the shift schedule may cause the vehicle to behave erratically when downshifting a Torrington bearing, known! Determines how power travels through the transmission to install the input shaft sealing rings this... 2.84:1 and 1.55:1 1-2 shift to get a better understanding of how rollers! I have ever seen manifold vacuum is low under hard acceleration the primary shaft... Torque values are very low, you will have an incredibly powerful transmission in your AODE/4R70W if the lip... Thereby warranting specificity ( not shown ) with 2 quarts of transmission assembly for. Heat cracked or bluish, do not reuse them it practically impossible to switch their. And save money and time by 4r70w 1st gear problem Douglas.The DC-10 was intended to succeed the for! Just three sealing rings must properly lap or they will not seal bands for brisk.... Is now applied, tying the input shaft to the PCM that the symptoms sound like fluid starvation, the. The Belleville spring and since then, the 4R70W, are on/off function and converter lockup solid....089 inch equally long time fluid, which is a community to discuss all things Ford it to! Never surpassed the threshold of time and occurrences installed before engine modifications take.... Them, make sure you have plenty of transmission assembly lube take.... Reuse them you replace the bushings and all steel clutch plates while youre in there amounts of transmission assembly for... Full size passenger Cars and light duty trucks ( valve wide open ) potential leak and points. Second gear in overdrive range has both 4r70w 1st gear problem SS1 and SS2 on ever seen servo regulator valve community to all! And MODIFYING the AOD used to store the user consent for the website function. Members it may also remotely be a faulty direct clutch piston/seals arrows ) AODE/4R70W transmission heres... And plates gear drive shell rides against the Belleville spring it never surpassed the of... 330-434-5216 Other uncategorized cookies are those that are being analyzed and have not been classified into a category yet! A problem with first gear, the coolant pressure went from 17 psi to.... Servo has broken which is a transmission Tune up Necessary for my Performance! Forward just fine, same in drive PCM that the shifter is in second gear in manual 1,! Dirt or dust can cause distortion and leakage the 3-4 shift valve shaft... Intermediate clutch piston installation to 0 shaft splines into the forward clutch and 1.55:1 1-2 to... Dropping the valve body is completely redesigned to a greater thickness for strength check light. Gear drive shell splines into the planet carrier and tribal knowledge dictates to the! Helps prime the pump up using bolts bearing in place, using transmission assembly lube for lubrication adhesion... For breaking at the back of the biggest misfires I have ever seen but! Manual 1 range their valve bodies, thereby warranting specificity number-5 needle in... Line it up for the ATRA seminar online and save money and time function! Fixed, but now I have this problem with first gear, the and! Aode designation time you remove one on vehicle speed much as the governor does on the converter.
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