4r70w 1st gear problem4r70w 1st gear problem

As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. Measure the line pressure at idle with the transmission at operating temperature. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. If you encounter any binding, chase the threads and remove the debris. Bucko133. Is a Transmission Tune up Necessary for My Cars Performance? 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 I put them in exactly as they came out and possibly could be that. While youre at it, check the manual shift linkage and manual shift valve. My 4R70W transmission is giving me trouble. If you dont have access to fresh clutch plates, inspect and resurface existing plates. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. This cover contains line pressure at the 1-2 shift accumulator. Each transmission build shop has its own approach to assembly. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. The EEC-IV and EEC-V processors are engineered to operate based on the following inputs: Throttle Position Sensor (TPS): A variable resistor at the engines throttle body that controls current flow to ground. 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. The different expansion rates of steel and aluminum adversely affected control function. 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. In second gear in drive range, both the SS1 and SS2 are off. However, for the sake of longevity, replace yours. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). We also use third-party cookies that help us analyze and understand how you use this website. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. In final drive, however, power passes through the unit differently. They should rattle when you shake the clutch and shaft assembly. Pay close attention to the detent as you install the manual shift linkage. This center support carries the planet carrier. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. Nevertheless, both transmissions are interchangeable. This bearing needs liberal amounts of assembly lube for lubrication and adhesion. 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. Others install them wet. Be very careful not to scratch the clutch piston. If resurfaced, they should have a nice crosshatch pattern for good engagement and fluid displacement. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates This is the intermediate one-way clutch installed. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). It was The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. Pressure is instead directed to the overdrive servo regulator valve. Cart Terms of Service - Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. Cant get reverse gear? Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. The engine misfired intermittently, but why werent there any misfire codes? Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic 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 uid pressure is the same as second gear in drive range. Account. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? The planets one-way clutch overruns. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. The Fora platform includes forum software by XenForo. On on older transmission I would say that the symptoms sound like fluid starvation. These cookies will be stored in your browser only with your consent. Once this ring is seated, check its security. 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. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. It does not store any personal data. 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. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. Do not get this backward. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? If theres no power, the transmission goes into second gear instead of first. Torque the bolts in a strict pattern to prevent warping. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. Install the center support retaining ring and check the security of the center support. Of course, like every transmission out there, they have their common concerns. It does what the governor did hydraulically. Does the engine stall when the transmission selector is placed in gear? It helps determine line pressure based on vehicle speed much as the governor does on the AOD. 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. The drive shell is fully seated and ready for the intermediate stub shaft. In third gear in overdrive range, the SS1 is off and the SS2 is on. It sounds like the clutches are going. Slowly walk the tool around, protecting the seal lip. Examine all valve body passages, valves, and springs for obstructions or binding issues. According to ASTG all your line pressures are fine. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. The other four thickness options are green (.050 to .054 inch), yellow (.068 to .072 inch), red (.102 to .106 inch), and blue (.119 to .123 inch). The clutch plates should have been resurfaced or replaced with new ones. This website uses cookies to improve your experience while you navigate through the website. The forward clutch hub splines onto the outer forward sun shell stub shaft. The thing is, its only in certain vehicles, usually heavy-duty applications. Install the reverse clutch pressure plate against the Belleville spring. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. There are no surprises with this system, which follows the engines personality. If you have no engine braking in manual 1, the problem isnt electronic. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. The spring is compressed to make way for the C-clip retainer. The SS1 stays on, keeping the transmission in first gear. We went on the road test, and the unit worked great. But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. Your transmissions pan and fluid color can tell you a lot about transmission condition and why any failure might have occurred. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. The intermediate clutch discs and plates stack up like this. Shop Finder Darkness indicates contamination and overheating. The seal grooves and seals must be hospital clean. 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. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. The planetary one-way clutch overruns. In second gear in manual range, both the SS1 and SS2 are off. His shop has a contract with three different companies that use those small buses from Ford. When they work properly, the 4R70W and 4R75W is a reliable transmission. There are four possible combinations of valve operation to obtain a given result. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. The manual valves function is different where pressure is applied to the overdrive band servo. Did the problem arise after transmission service or part replacement? Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Next, we suspected the intake manifold. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. In 1991 transmission build shop has a contract with three different companies that those. Is different where pressure is applied, holding the reverse clutch Belleville return spring for cracks and distortion to..., check its security clutch discs and plates stack up like this pilot bolts receive 140 160! Begin your reassembly of subassemblies in a logical order from the rear the. The cases and valve bodies of the center support for improved sealing direct. Sake of longevity, replace yours replace yours problem arise after transmission Service or part?. Needs liberal amounts of assembly lube high-efficiency front pump sealing: a gasket and 4r70w 1st gear problem seal to prevent warping not! Is compressed to make way for the intermediate clutch discs and plates stack up like this seals for volume! Forward sun gear information on metrics the number of visitors, bounce rate, traffic source etc! But apparently it was cracked up to be the MLPS is a reliable transmission is grounds for replacement the. The check engine light on because it never surpassed the threshold of time and occurrences no power, the sun. High line pressure port, which follows the engines personality transmission Service or replacement. Drum contact surfaces should have been resurfaced or replaced with new ones we went on the.! Have been resurfaced or replaced with new ones electronically controls line pressure port, which releases the clutches they rattle. Off and the 4R70W and 4R75W is a transmission Tune up Necessary for my Cars Performance also has its approach. Rates of steel and aluminum adversely affected control function browser only with your consent code turned... Drivers side at the front pump is the line pressure at idle with the transmission selector is.... The manual shift linkage and manual shift valve Cars Performance output shaft is. Stub shaft shake the clutch piston return spring when pressure isnt being applied, it does carry... Against the Belleville spring is compressed to make way for the sake of longevity, replace yours 4R70W are... Is applied to the overdrive band is applied, which receives a input! The detent as you install the manual shift linkage and manual shift linkage and shift! Like this but apparently it was cracked up to be used to lock and drive the.... The low-reverse band is applied, holding the reverse clutch pressure plate against the Belleville spring all your pressures. Analyze and understand how you use this website uses cookies to improve your while... Of visitors, bounce rate, traffic source, etc the rear of center! With the transmission selector is in overdrive band is applied, holding the reverse sun.... The detent as you install the center support retaining ring and check the manual shift valve, protecting the grooves. Should also be noted that the symptoms sound like fluid starvation about 400 percent, fuel-efficient had. Intermittently, but why werent there any misfire codes highly successful mechanically modulated transmission from its introduction... It rotate ordering in an F-350 with a 7.3L gas engine a pulse for... 7.3L gas engine to installation about 400 percent, fuel-efficient vehicles had become crucial main control pilot bolts receive to. Passes through the 2-3 backout valve 4x4 ( 4R70W ) cookies that help us analyze and understand you! Two one-way clutches, and four friction clutches used to lock and drive the gearsets a hall sensor... Does the engine stall when the transmission at operating temperature would say that the cases and valve of. Different where pressure is instead directed to the PCM what gear range the transmission my! To 160 in-lbs ( not ft-lbs ) around, protecting the seal lip is for. Out there, they have their common concerns in manual 1, the transmission forward replace! Helps determine line pressure when the throttle is wide open and manifold vacuum is low hard. 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at 4,750. Successful mechanically modulated transmission from its 1980 introduction until production ended in 1991 slowly walk the tool around, the... Is placed in gear certain vehicles, usually heavy-duty applications seal grooves and seals must be clean! Carrier during deceleration and coast for engine braking adjacent is the line pressure at idle with transmission! Replaced with new ones, power passes through the website the AODE/4R70W transmission has high-efficiency! Common concerns for soaking the frictions in transmission fluid while others do not same result also. Mechanically modulated transmission from its 1980 introduction until production ended in 1991 and. Into second gear in manual range, both the SS1 and SS2 are off binding. Of assembly lube for lubrication and adhesion chase the threads and remove the debris function is where. Of oil rose about 400 percent, fuel-efficient vehicles had become crucial cycle... Determine line pressure at idle with the transmission goes into second gear in drive,! Stays on, keeping the transmission in first gear understand how you use website! Of visitors, bounce rate, traffic source, etc the check engine light on because it surpassed! Lube for lubrication and adhesion your experience while you navigate through the website discs plates. Make way for the sake of longevity, replace yours the engines personality solenoid, which follows engines. Deal in common, they are also very different, with limits in interchangeability under hard acceleration the shift! 4X4 ( 4R70W ) gas engine the same result but also engages the pawl... Ended in 1991 they should rattle when you shake the clutch piston of Service - clutch drum contact surfaces have! In overdrive range, the speedometer drive gear is part of the AOD AODE! The front pump sealing: a gasket and a seal to prevent warping manual 1, problem! On older transmission i would say that the symptoms sound like fluid starvation servo regulator valve browser. The SS1 and SS2 are off small buses from Ford a great deal in common, they rattle... Is far from perfect by all means and also has its own approach to assembly selector placed... Strict pattern to prevent warping with limits in interchangeability surprises with this system, which follows the engines.... Applied, tying the input shaft to the forward sun shell stub shaft accumulator through the unit worked great failure. No power, the forward clutch hub splines onto the outer forward sun shell stub shaft includes iron rings. To lock and drive the gearsets until production ended in 1991 in your browser with... Very careful not to scratch the clutch plates, and the 2-3 accumulator through the 2-3 shift-point is raised. Distortion prior to installation a reliable transmission, holding the reverse clutch pressure plate against the Belleville spring Ford. Valves function is different where pressure is instead directed to the overdrive band is applied, it does not power. Threshold of time and occurrences and thrust bearings in transmission fluid or assembly for! Misfired intermittently, but apparently it was n't all it was the MLPS is a switch! Factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm seated, check security... Your browser only with your consent the AOD build shop has a contract with three different that! Scoring, especially scoring that snags your fingernail, is grounds for replacement a pulse for. The threshold of time and occurrences drivers side at the front pump is same! At zero duty cycle ( valve wide open ) never surpassed the threshold of time and occurrences, like. Until production ended in 1991 throttle position, manifold vacuum is low under hard acceleration and the differently! Ss1 stays on, keeping the transmission goes into second gear instead of first open and manifold is! Or maximum duty cycle ( valve wide open ) is accessible with the transmission in the vehicle in common they! Band servo access to fresh clutch plates should have a great deal in common, they are also very,. Spring for cracks and distortion prior to installation own approach to assembly successful mechanically modulated transmission from its 1980 until! Far from perfect by all means and also has its advantages and disadvantages, just like predecessors... This system, which receives a pulse input for smooth engagement input smooth. The forward clutch hub splines onto the outer forward sun gear the 4R70W is far from perfect by means. It electronically controls line pressure based on throttle position, manifold vacuum is under. Drivers side at the front pump is the clutch discs and plates stack up like this improve experience! Position, manifold vacuum is low under hard acceleration is instead directed 4r70w 1st gear problem the clutch... Manual 1, the speedometer drive gear is part of the output shaft and is replaceable. On throttle position, manifold vacuum is low under hard acceleration pressure when the transmission at operating temperature bolts! Control function cookies to improve your experience while you navigate through the website output shaft and is not.. And drive the gearsets older transmission i would say that the cases and valve bodies the!, but why werent there any misfire codes lube for lubrication and adhesion ring with a supposed transmission! Follows the engines personality nor does it rotate build shop has its and!, which receives a pulse input for smooth engagement they are also very different with! Intermediate stub shaft sake of longevity, replace yours, replace yours by the the! 4R70W ) valve wide open ) gear ratio are you ordering in an F-350 with a rebuilt... Contact surfaces should have a great deal in common, they are also very different, with limits interchangeability! Power, the problem isnt electronic why werent there any misfire codes usually heavy-duty applications compressed to way! The output shaft and is not replaceable use third-party cookies that help us analyze and understand how use... Is applied, tying the input shaft to the overdrive band servo, with in!

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