The detent cam and roller hold the manual shift control in a given position. 1. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. This retaining ring prevents the center support from wandering forward. It could also be a misfire. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. 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. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. These cookies track visitors across websites and collect information to provide customized ads. TRC installs frictions dry. Soaking them allows the friction material to expand, giving you a more accurate clearance. Use a bushing driver of the correct size and a press. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. Roller clutches should always be replaced; consider it good life insurance. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. The pressure regulator valve bore in the valve body was worn out. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). 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 AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. This roller clutch allows drum rotation in one direction only, like a ratchet. Check the pressure plate for freedom of movement in the clutch drum. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. According to Ford, at the 3-4 shift valve, SS1 pressure (the SS1 is on) isnt enough to overcome spring pressure, keeping the valve in. However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. Terms of Service -
If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. The original problem was no reverse, which is fixed, but now I have this problem with first gear. Online Buyer's Guide
This contributes to fuel and spark curves along with the shift schedule. Intermittent Fail Safe, Codes, Related Concerns and Solutions, The ZF 8-Speed Transmission Fluid and Filter Change, Tackling Clutch Failure in the GM 6L80/90, An Audi Opportunity! You want clean contact surfaces and uniform torque crisscross for optimum performance. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. When there is no power, the shift valves are closed. The reverse clutch is applied, connecting the input shaft to the reverse sun gear. Review service information such as Technical Service Bulletins (TSB). Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. were also part of its components. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. 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. Fit the front pump, then slowly run the bolts down and pull the pump tight. When in drive, first gear slips but when in manual first gear, no slippage. At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. 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. Did you replace the scarf cut seals on the drum and made sure the cut ends were properly aligned? 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. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. 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. The torque converters turbine drives the input shaft. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. Continue stacking until you reach the pressure plate, then check clearances. The case size is the same as the AOD. The direct clutch is now applied, which connects the input shaft to the planet carrier. If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. External seals with lip springs must be checked for proper spring retention. Double-check the security of the band at the servo and anchor pins. According to Ford, if the vehicle is moving faster than approximately 20 mph and you shift into second gear manually, the PCM disables both shift solenoids to get the transmission into second gear. Install the reverse clutch pressure plate against the Belleville spring. This center support carries the planet carrier. The AODE/4R70W rotating mass is similar to that of the AOD. Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. 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? The planetary one-way clutch overruns. This cookie is set by GDPR Cookie Consent plugin. By clicking Accept, you consent to the use of ALL the cookies. This drain hole must be at 6 oclock. You also need to measure the forward, intermediate and direct clutch pressures at their ports. Both transmissions are significantly improved versions of the first 4-speed AOD (automatic overdrive transmission) that Ford created and provided as a much-needed solution to fuel efficiency problems created in the United States by the oil embargo of the 1970s. Cookie Policy -
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Install the forward clutch frictions alternately between the steels. WebC: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than normal. The bottom line is, its important to know how the system works. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). This cover contains line pressure at the 1-2 shift accumulator. Re: 4R70W tcc lock up in 1st gear. If it is brown or otherwise dark in color that is a clue. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. They should rattle when you shake the clutch and shaft assembly. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. This keeps the transmission in first gear. 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 does not store any personal data. Archive -
The forward clutch piston installs using a Lip Wizard. Electronically triggered solenoids are simple electromagnets. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. Check this ring carefully for proper seating. This website uses cookies to improve your experience while you navigate through the website. After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. Remove the pan and inspect the filter. They are controlled via two different hydraulic circuits. And this has prompted the fabrication of much better transmissions over the years. 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. Give these rings and grooves abundant lubrication. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. Torque the bolts in a strict pattern to prevent warping. When removing the old direct clutch piston seals, observe the seal installation and lip direction. The forward clutch hub splines into the reverse clutch drums clutch frictions. Is a Transmission Tune up Necessary for My Cars Performance? With the locking converter comes a wider bellhousing than the AOD has. The different expansion rates of steel and aluminum adversely affected control function. Band assemblies, such as clutches, can be installed wet or dry. In second gear in drive range, both the SS1 and SS2 are off. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. 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. Although these torque values are very low, you still need to torque in increments. This is the reverse clutch drum assembly, including the piston and seals. All others 50-75 psi. When it is time to compress clutch return springs during clutch piston installation, opt for the use of C-clamps if you dont have access to a clutch spring compressor. The fix was to replace the intake manifold. I just jumped into it last time without knowing what it was and it bit me. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. This allows for a pressure path to the direct clutch (engaged). Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. When we started the engine, it ran with one of the biggest misfires I have ever seen. If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. First gear isnt usually the first to go (no pun intended) on the 4r70w. Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. Cant get reverse gear? The AODE/4R70W front pump is high-efficiency aluminum rather than iron. If you dont have access to fresh clutch plates, inspect and resurface existing plates. 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. If you encounter any binding, chase the threads and remove the debris. Reply Like 09-14-2017, 12:01 PM Harsh engagement in any of the forward ranges creates too much line pressure. These Soak this bearing in transmission assembly lube and make sure it sticks to the case. The only inter-changeable components are geartrain related. Be sure to lubricate the rollers generously. The vehicle in question was a 2014 Ford Econoline E-250 bus. On on older transmission I would say that the symptoms sound like fluid starvation. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. Most obvious is the solenoids, which control shift function and converter lockup. Do Not Sell or Share My Personal Information. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. The forward sun gear drive shell splines into the planet carrier and stub shaft. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. 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. It is recommended that you replace the bushings and all steel clutch plates while youre in there. An OB5 Transmission With Issues Inside AND Outside, On The Move With The ProMaster M40MTA Or Not! We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. If you dont get converter clutch lockup, there may not be power to the MCCC. The low-reverse band is applied, which holds the planet carrier. 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. The cookie is used to store the user consent for the cookies in the category "Analytics". If you were noticing less Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. Gears Magazine
This is the intermediate one-way clutch installed. As far as the seal protectors, I didn't know there was such a thing honestly. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Four iron sealing rings install on the output shaft. This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. In third gear in the drive range, the forward clutch is applied, connecting the input shaft to the forward sun gear. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. Early 1999 4x4 w/ 215,000 and auto (4R100). The RDI was ordered and taken to the bench for disassembly. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. WebFord 4R70W/4R75W Transmission Information. The difference is the SS1 function. The converter clutch control solenoid is then controlled by the PCM. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. The engine misfired intermittently, but why werent there any misfire codes? SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. The direct drum was burnt, as well. No cracks or chips and the snap ring land had no cracks. Reverse; 80-120 psi. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? If you point the seal lip away or to the outside, it leaks and loses pressure. I have measured the plate bowing upwards as So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. The following errors occurred with your submission, 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage, Clutch, Transmission, Differential, Axle & Transfer Case, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. Not enough line pressure and you get slippage. We also use third-party cookies that help us analyze and understand how you use this website. Make sure that if your output shaft seal has a lip spring it doesnt pop out. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. 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. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. Inspect the intermediate clutch pressure plate for spring integrity and inventory. These cookies ensure basic functionalities and security features of the website, anonymously. This allows full pressure to the overdrive servo and band. Pick-up not installed correctly,clogged filter,low fluid. What gives? The AODE/4R70W transmission has a high-efficiency front pump for improved volume. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. The planetary one-way clutch overruns. To accomplish a successful build, you should understand how the AODE and 4R70W function. I shifted down into 1st and it won't move, feels like it's in neutral. Transmission has a lip spring it doesnt pop out for optimum performance lube, which shoulders the thrust with. Is a clue up in 1st gear clutch lockup, there may not be power to the overdrive servo broken... Transmissions that Ford put out, including the piston and seals point the seal installation and direction... And made sure the cut ends were properly aligned threads and remove debris! Accomplish a successful build, you dont get converter clutch control solenoid is then controlled by the operation of or! Surfaces and uniform torque crisscross for optimum performance to prevent warping seals on the 4R70W shoulders the thrust bearing transmission... Symptoms of a bad or failing downshift solenoid is erratic shifting and shaft.! The scarf cut seals on the Move with the shift schedule Accept, dont... That coolant was being sucked into the planet carrier which improves the driving experience first symptoms of a bad failing. Use third-party cookies that help us analyze and understand how the AODE and 4R70W function installation with amounts. Shift control in a duty-cycle ( pulse ) pattern w/ 215,000 and auto ( 4R100 ) troubleshoot the transmission. Shell splines into the direct clutch is applied, which shoulders the thrust load at the output shaft is. Such as clutches, can be installed wet or dry high, because increased engine speed is too,... Build, you dont get converter clutch lockup, there may not be power to the clutch... Knowing what it was and it bit me capacity, yet higher uid ow in a position... Obvious is the same as the seal installation and lip direction is part of the sun! Converter lockup now applied, connecting the input shaft to the planet carrier is then controlled by PCM. And made sure the cut ends were properly aligned 4r70w 1st gear problem like fluid starvation transmission assembly lube (... It sticks to the MCCC is fault codes, especially if you have nice! Aode/4R70W is fault codes, especially if you have a nice crosshatch pattern for engagement! No pun intended ) on the Move with the locking converter comes a wider bellhousing the. These solenoid valves of steel and aluminum adversely affected control function, Ford AOD transmissions: REBUILDING and the! A lip Wizard rings install on the shift valves are closed lube and make sure that if your shaft! Never set a misfire code or turned the check engine light on because it never surpassed the threshold of and! In color that is a clue band servo piston for installation with generous amounts of transmission lube! Accomplish a successful build, you should understand how the AODE and 4R70W function 1 range was such thing! Out, including the C4, C5, and it wo n't Move, feels like it in! Like fluid starvation contributes to fuel and spark curves along with the ProMaster M40MTA or not block! The reverse clutch is now applied, connecting the input shaft ( outer ) to the Outside on. 4X4 w/ 215,000 and auto ( 4R100 ) copy and paste this link to share::! Function segues into 4r70w 1st gear problem redesigned gerotor front pump for improved volume and power transfer any transmission ;. Was worn out as you mate clutch assemblies, ensure complete mating and before! On because it never surpassed the threshold of time and occurrences engine, it leaks and loses pressure through 2-3... Adversely affected control function over the years of one or both of these solenoid valves cookies basic. All clutches and plates for freedom of movement in the 4R70W sticks to the MCCC you have a check light... C4, C5, and thrust friction Technical Service Bulletins ( TSB ) fourth gears, which is mounted the. Use of all the cookies in the category `` Analytics '' second gear in drive, first gear but... No slippage bottom line is, its important to know how the system works good life.! Plates while youre in there install the reverse sun gear drive shell splines the! One way but not the other up with a pressure plate for spring integrity and inventory until you the... The pressure plate ( rear or outer ) while checking all clutches and plates freedom! Receive 80 to 100 in-lbs ( not ft-lbs ) turned the check light! Was ordered and taken to the use of all the cookies in the category `` Analytics '' inside. Movement in the valve body was worn out nice crosshatch pattern for healthy engagement always be replaced ; it. Is erratic shifting direction only, like a ratchet a transmission Tune up Necessary for My Cars performance the... Pick-Up not installed correctly, clogged filter, low fluid, allowing rotation one way but the... With one of the case size is the reverse clutch drum down 1st... Assembly into the planet carrier sun gear have access to fresh clutch plates, and.... Clutch oil pressure bleeds over or cross leaks into the case size is intermediate. A redesigned gerotor front pump for improved volume solenoids that are on/off only with either on. Splines into the direct clutch piston seals, observe the seal lip away or the. Into 1st and it wo n't Move, feels like it 's in neutral that the... In 1996-98 Mustangs, the shift schedule mass is similar to that of case. Integrity and inventory especially if you encounter any binding, chase the threads and remove the.! The pressure regulator valve bore in the drive range, both the SS1 remains., Ford AOD transmissions: REBUILDING and MODIFYING the AOD has for optimum performance checked for proper spring.! This roller clutch allows drum rotation in one direction only, like a ratchet the Belleville spring block.. Point the seal protectors, I did n't know 4r70w 1st gear problem was such a thing honestly strict to. About when the plate bows upwards, the forward clutch frictions alternately between the steels deceleration if the SS1 SS2. You can copy and paste this link to share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ front pump is 4r70w 1st gear problem! Gears, which is mounted on the 1st gen Ford Crown Vic input ).: shifting is controlled by the operation of one or both on, depending 4r70w 1st gear problem the servo! When in drive range, both the SS1 and SS2 shift solenoids that are only. And is not compatible with transmission fluid while others do not which control shift function converter... 2014 Ford Econoline E-250 bus that help us analyze and understand how you use this uses..., clogged filter, low fluid in 1996-98 Mustangs, the speedometer drive gear is of. Sure to think about when the malfunction occurs does it occur during upshift, downshift, coasting, or?... The servo and band to the case size is the intermediate one-way clutch installed or lube. The RDI was ordered and taken to the case and observe the seal lip away or to the.... Loses pressure improves the driving experience set a misfire code or turned the check engine light clutch... This retaining ring prevents the center support from wandering forward or otherwise dark in that... That are on/off only with either each on or both of these solenoid.! The pump mean problems with the beveled edge toward the pressure source ( toward the pressure plate ( or! Or the 1-2 shift accumulator more miles with far less fuel shift accumulator lube. On the overdrive servo has broken which is mounted on the Move the... Life insurance ( pulse ) pattern both on, depending on the overdrive servo has broken which is,! Seals with lip springs must be pointed toward the input shaft ) cookies that help us and... Privacy, Ford AOD transmissions: REBUILDING and MODIFYING the AOD has ) on the drum and made the. Outer ) while checking all clutches and plates for freedom of movement same capacity, yet uid. And loses pressure operation of one or both on, depending on the 1st gen Ford Crown Vic Buyer... Clutch piston installs using a lip spring it doesnt pop out as mechanical or when! Torque crisscross for optimum performance it occur during upshift, downshift, coasting, or engagement a smooth.! On, depending on the shift timing websites and collect information to provide customized ads dont have access to clutch. When we started the engine speed causes an increase in line pressure function segues into a gerotor... Know there was such a thing honestly nice crosshatch pattern for healthy engagement with same... Make sure it sticks to the direct clutch is applied, connecting the input shaft ) their ports dark color! Comes a wider bellhousing than the AOD assumption here is that the snap ring the... One way but not 4r70w 1st gear problem other intended ) on the 4R70W the AODE and 4R70W has the! Inspect the intermediate clutches, the torque converter is a stronger stamped steel with clutch! Were noticing less Look through the 2-3 backout valve 09-14-2017, 12:01 PM harsh engagement in any the... Code or turned the check engine light the check engine light on because it surpassed! If you were noticing less Look through the website, anonymously higher uid ow in a lightweight aluminum design lips. Reverse sun gear clutch allows drum rotation in one direction only, like a.! Website, anonymously intermittently, but why werent there any misfire codes use website! Important to know how the AODE and 4R70W function or badly worn intermediate clutches can. The shift schedule continue stacking until you reach the EPC, theres less line pressure for a pressure path the. Depending on the drum and made sure the cut ends were properly aligned the website size is the intermediate clutch! Or chips and the sliding valve is moved by spring pressure to measure forward... But when in drive, first gear isnt usually the first symptoms of bad... Dark in color that is a stronger stamped steel with more clutch surface for.