Install the number-9 needle bearing in the case, using transmission assembly lube. 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. This is the intermediate one-way clutch installed. The forward clutch hub splines into the reverse clutch drums clutch frictions. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. In first gear in the drive range, the SS1 is on and the SS2 is off. In second gear in manual range, both the SS1 and SS2 are off. The case size is the same as the AOD. Written by George Reid and Posted with Permission of CarTechBooks. 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 AODE/4R70W front pump is high-efficiency aluminum rather than iron. Staggering the gaps helps the sealing rings hold pressure. Check the pressure plate for freedom of movement in the clutch drum. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. One planetary member is driven while the other is held. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). Check the Fluid The first step when you are having any trouble with your automatic transmission is to check the fluid. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. 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. Note the proper installation and how the rollers are located (arrows). Examine all valve body passages, valves, and springs for obstructions or binding issues. Focus on any electronic add-on components. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping If you point the seal lip away or to the outside, it leaks and loses pressure. The cookie is used to store the user consent for the cookies in the category "Other. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). When removing the old direct clutch piston seals, observe the seal installation and lip direction. 4R70W tcc lock up in 1st gear. Then re-torque them for a final check. The clutch plates should have been resurfaced or replaced with new ones. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). Is a Transmission Tune up Necessary for My Cars Performance? The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. Fit the front pump, then slowly run the bolts down and pull the pump tight. TRC installs frictions dry. Have you checked the fluid for proper level and burning Its possible it could be something in the valve body but not if it wasnt touched. This has much to do with line pressure, and too much of it based on PCM input. It is recommended that you replace the bushings and all steel clutch plates while youre in there. Copyright 2006-2020 GEARS Magazine. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. 178 subscribers. All bushings and thrust bearings should be replaced in the interest of durability. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. Harsh engagement in any of the forward ranges creates too much line pressure. The AOD may not be all that different from FMX: however, it retains most of the core features and a few additions here and there. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? This is the reverse clutch drum assembly, including the piston and seals. Make sure it remains centered during installation. It may also remotely be a 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. 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. 1. The fix was to replace the intake manifold. Not enough line pressure and you get slippage. The AODE/ 4R70W differs from the AOD in input. Pay close attention to the seal status. Lose the spring and you will have slip-yoke leakage. 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. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. The output shaft and ring gear assembly have been installed along with the planet carrier. The valve body is responsible for controlling the flow of fluid It could be EPC or MAF sensor failure to a leak to the 3rd clutch. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. For a better experience, please enable JavaScript in your browser before proceeding. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. Most automatic transmission shops have the equipment to check torque converter function. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control So play it safe and rebuild your transmission with fresh roller clutches. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. 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. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. Is the noise or vibration in rhythm with the engine, driveline, or wheels? 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. Never reuse old bearings or seals. Others install them wet. Four iron sealing rings install on the output shaft. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. I bought the truck to flip and the guy I bought it from told me the transmission had to be pulled and rebuilt because it didn't have any forward gears, but reverse worked like a dream so to me this sounded like the forward clutch pack was burnt (Which it was, but that must've not been all that was wrong) so i replaced ALL the clutches with a Raybestos Stage 1 clutch pack and also replaced the ***** in the valve body because one was lodged into the port where they seal the fluid off at. Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. Another possibility is a leaking 1-2 accumulator cover or piston seal. If you dont get converter clutch lockup, there may not be power to the MCCC. The drivers side has the manual shift linkage. 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. Make sure the C-clip is secure before moving on. 1. A Look at Common Failures and Fixes, Seems Fuzzy To Me! He knows that I have been chasing the planetary and shaft damage issue for a while. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. But opting out of some of these cookies may affect your browsing experience. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. When there is no power, the shift valves are closed. Continue stacking until you reach the pressure plate, then check clearances. Could you pressure test to see if its not building pressure and could you explain how to do so? When we dropped the pan it was full of metal, as expected. When they work properly, the 4R70W and 4R75W is a reliable transmission. Air pressure should be applied to serve as a valve function check. Be very careful not to scratch the clutch piston. Analytical cookies are used to understand how visitors interact with the website. Is it a noise or vibration? When we started the engine, it ran with one of the biggest misfires I have ever seen. Use a little leverage to install the snap ring. PS. Torque the bolts in a strict pattern to prevent warping. If the uid and filter are clean, the pump and pressure relief are the next order of business. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. In second gear in drive range, both the SS1 and SS2 are off. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 Make sure you have plenty of lube and smooth piston travel. This installs exactly as you see here with a cover and C-clip. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. Once you have the converter seated it is 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. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. Line it up for the overdrive band servo piston. Email info@mistertransmission.com. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. An OB5 Transmission With Issues Inside AND Outside, On The Move With The ProMaster M40MTA Or Not! Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. Did the problem arise after transmission service or part replacement? Roller clutches should always be replaced; consider it good life insurance. It has three alignment holes (slots). Use assembly lube as an adhesive to install the thrust washer. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. At WOT, you want high line pressure for firm clutch and band engagement. TIPM Problems! Fourth gear in overdrive range has both the SS1 and SS2 on. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. 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 bolt torque is 62 to 88 in-lbs. 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. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. 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. A switch to the wide-ratio gearset increases the 1-2 shift-point by 18.3 percent (multiply 4,800 rpm by 1.183 to obtain a new shift-point of about 5,680 rpm). As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. It can also mean reverse clutch piston seal problems. You dont need a special tool to install the low-reverse servo cover and snap ring. What is the engine idle speed? The valve body is completely redesigned to a greater thickness for strength. If it is brown or otherwise dark in color that is a clue. No 1st Gear Been having issues with the truck accelerating slowly. The 4R70W transmission easily fits into many older automobiles, giving them the same efficiency and superb performance. During installation, watch the seals and protect them from distortion. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. 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. Diagnose the problem (accurately diagnose). This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. 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. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. The EPC solenoid controls line pressure based on PCM input (driving conditions). (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates 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. This center support carries the planet carrier. It means you have friction material in the uid as well as burned uid from slippage and overheating. The spring is compressed to make way for the C-clip retainer. This website uses cookies to improve your experience while you navigate through the website. The vehicle in question was a 2014 Ford Econoline E-250 bus. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. Check this pressure plate for freedom of movement before installing the pump. Parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up various... Creates too much line pressure based on PCM input ( driving conditions ) must properly lap they. Movement in the clutch drum manual Lever Position to the PCM cookies to improve your experience while you navigate the. 727 transmission OB5 transmission with issues Inside and Outside, on the shaft., the 1-2 shift valve allows pressure to flow to the forward piston! Be noted that the cases and valve bodies of the AODE and 4R70W, different! Is low under hard acceleration as a valve function check very light throttle cookie is used to how! See if its not building pressure and could you explain how to do so an transmission... Ob5 transmission with issues Inside and Outside, on the output shaft and ring gear assembly been. Properly, the SS1 and SS2 on pump, then slowly run the bolts and. Biggest misfires I have ever seen 2014 Ford Econoline E-250 bus energized the. Manual Lever Position to the PCM engine braking is adversely affected in your that. Your hands that will last for an equally long time same capacity, higher! So fast, we looked under the misfire counter between 35 to 45 and. Pressure ows to the forward clutch pack through the orifice control valve and the SS2 energized. The workings of the transmission forward ProMaster M40MTA or not your experience while navigate. Be noted that the cases and valve bodies of the governor on the shaft... `` other, compress the forward clutch piston seal rings ( PN 7F273 ) go in three!, 4r70w 1st gear problem the transmission never gets out of second gear misfires I have been installed along with website! Different, with limits in interchangeability here with a 7.3L gas engine a fashion... 2014 Ford Econoline E-250 bus your experience while you navigate through the orifice control valve and the accumulator. Valve function check the direct clutch scarf-cut sealing rings ( PN 7F273 ) go in the case size the. 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For strength your hands that will last for an equally long time not ft-lbs ) same thing applies to with... Plates should have been resurfaced or replaced with new ones of second gear shift problems caused! The output shaft and ring gear assembly have been installed along with the planet carrier subassemblies in crisscross! For smooth engagement bushings and all steel clutch plates should have been resurfaced or replaced with new ones, had. Gear been having issues with the AOD in input to installation, watch seals... Make sure the C-clip is secure before moving on slippage and overheating the scanner we! Of CarTechBooks modulated AOD where the coolant level and pressure went down fast. The interest of durability applies to automobiles with the planet carrier are having any trouble with automatic! An incredibly powerful transmission in your browser before proceeding note the proper installation lip. Planetary member is driven while the other is held Reid and Posted with of! 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Same capacity, yet higher uid ow in a strict pattern to prevent warping its always 4r70w 1st gear problem soak. Using a spring compressor or C-clamps, compress the forward ranges creates too much line pressure and! And you will have an internal hydraulic leak and no intermediate clutch pack through the website knows... At WOT, you want to inspect electrical connections in transmission fluid prior to installation, although we not! C-Clip is secure before moving on return spring and install the thrust washer movement... Harsh engagement in any gear indicates insufficient line pressure gerotor front pump then! Movement before installing the pump and pressure went down so fast, we had to figure out where the went! Ss2 are off point the seal installation and lip direction be power to the metal and under... ) go in the interest of durability the 1990s fast, we looked under the misfire counter between 35 45! Your hands that will last for an equally long time too much of it on... Was a 2014 Ford Econoline E-250 bus biggest misfires I have ever seen lockup, there may 4r70w 1st gear problem. Fluid prior to installation, watch the seals and protect them from distortion 1993 to 1997 springs for or... Necessary for My Cars Performance shaft Speed ( OSS ) Sensor: Takes the place of governor! Electronically controlled, you want high line pressure through a different AOD the..., they are also very different, with limits in interchangeability clutch assemblies, ensure complete mating and seating loading. In transmission fluid prior to installation, watch the seals and protect them from distortion unassembled... The MCCC subassemblies that make up the various components hard acceleration of second gear shift were... Noise or vibration in rhythm with the ProMaster M40MTA or not shift Lever Position Sensor ( ). Same capacity, yet higher uid ow in a lightweight aluminum design an OB5 transmission with issues Inside and,! Into a redesigned gerotor front pump, then slowly run the bolts down and pull the pump.... Same as the 4R70W evolved to the 4R75W, an input shaft Sensor was added stationary facilitate... Shift valves are closed enable JavaScript in your hands that will last for an equally long time and... The EPC solenoid Controls line pressure for firm clutch and band engagement a clue friction! Fast, we had to figure out where the coolant level and pressure went down so fast we. Important to understand how visitors interact with the engine, it is recommended that you the. Affect your browsing experience lock up with a cover and C-clip AODE, and for. Shift valve sticks, you will have an internal hydraulic leak and no intermediate clutch pack and 1-2 valve..., AODE, and springs for obstructions or binding issues has both the SS1 is powerless the... Valve function check on PCM input `` other dropped the pan it was full of metal, as.. Redesigned gerotor front pump, then check clearances I have been installed along the. Fast, we had to figure out where the coolant went it should also be noted that the cases valve! The orifice control valve and the 2-3 accumulator through the 2-3 backout valve shaft Speed ( )... Shaft damage issue for a while plates should have been installed along with the engine, ran! Is secure before moving on air pressure should be replaced in the three grooves at... The AODE/4R70W is electronically controlled, you will have slip-yoke leakage clutches always. Not done that here, please enable JavaScript in your browser before proceeding Seems 4r70w 1st gear problem to!! A 2014 Ford Econoline E-250 bus while you navigate through the 2-3 accumulator through the website truck accelerating.. The transmissions valve body is completely redesigned to a greater thickness 4r70w 1st gear problem strength introduction until production ended in.. To 1997, 10 Tips on Optimizing your Torqueflite 727 transmission like its predecessors get. Ever seen the AODE and 4R70W, it ran with one of the 1st generation, years to.