Overhaul Automatic Transmission: Assembly: Transmission
All vehicles
- Thoroughly clean the transmission case and extension housing in solvent and blow dry with compressed air.
- Inspect the transmission case for the following:
- stripped bolt hole threads
- gasket and mating surfaces for burrs or nicks
- obstructions to vent and fluid passages
- cracks or warpage
4x2 vehicles
- Inspect the extension housing for cracks, burrs or warpage.
4x4 vehicles
- Inspect the extension housing for cracks, burrs or warpage.
All vehicles
- Inspect case bearing for damage. Install a new component as necessary. Follow Steps 5-8 if replacing the case bearing. If not replacing the case bearing, proceed to Step 9.
- Using the special tool, remove the case bearing.
- Use an oil stone to remove any nicks or burrs in the bearing case bore.
- Assemble the special tools.
- Install the bearing on the special tools.
- Using the special tool, tap case bearing into case bearing bore.
- Using the special tool, install the transmission into the bench with the converter housing facing up.
- Using the special tool, install the manual control lever shaft seal and lubricate it with petroleum jelly.
- Install the intermediate servo piston and spring.
- Lubricate the servo bore with clean automatic transmission fluid.
- Using the special tool, install the retaining ring.
- Install the overdrive band servo piston and spring.
- Lubricate the servo bore with clean automatic transmission fluid.
- Using the special tools, install the retaining ring.
- Install the parking lever rod.
- Install the manual control lever.
- Assemble the manual valve inner lever and parking lever actuating rod as shown.
- Install the manual control lever shaft.
- Install the manual valve inner lever onto the manual shaft and loosely install the nut.
- Install the manual control lever shaft spring pin.
- Tap the manual control lever shaft spring pin into the transmission case.
- Tighten the nut.
- Install the output shaft thrust washer (No. 11).
- Coat the output shaft thrust washer with petroleum jelly.
- Install the park gear on the output shaft.
- Install the output shaft and park gear.
- Install the low/reverse band over the low/reverse brake drum.
- Install the low/reverse brake drum.
- Rotate the low/reverse brake drum clockwise to install.
- Install the reverse band actuating lever into the reverse band.
- Install the reverse band actuating lever shaft into the case and into the reverse band actuating lever.
- Install the No.10 needle bearing into the case.
- Install the output shaft ring gear, hub, and seal.
- Install a new output shaft retaining ring.
- Install the output shaft sleeve.
- Install low/reverse planetary carrier needle bearing (No. 9) onto the output shaft ring gear and hub assembly.
- Install the low/reverse planetary assembly.
- Install the retaining ring.
- Install the No. 8 thrust bearing.
- Install the spacer on the input shell, using petroleum jelly to hold it in place.
- Install the input shell and sun gear assembly.
- Install the forward planetary assembly.
- Install the No. 7 forward planet thrust bearing into the forward ring gear and hub assembly. Use petroleum jelly to hold the bearing in place.
- Install the No. 6B forward clutch thrust washer onto the forward ring gear hub.
- Install the forward ring gear and hub as an assembly.
- Install the No. 6A forward ring gear hub thrust bearing into the forward ring gear and hub.
- Install the forward clutch cylinder.
- Install the No. 5 thrust bearing.
- Install the direct clutch drum.
- Using the special tool, measure from the top of the gauge bar to center support ledge in case at four places 90 degrees apart.
- Add the four measurements, divide by four, and record as dimension A.
- Install the special tool.
- Install the special tool and the bolts using the two pump screw locations at approximately 6 and 12 o'clock positions.
- Tighten the center screw.
- Measure the distance from the top of the gauge bar to the drum bearing surface through the hole in the disc and record as dimension B. Repeat measurement 180 degrees opposite side of the special tool and record as dimension C.
- Add dimension B to C, divide by two and record as dimension D.
- Subtract A from D, and record as dimension E.
- Select bearing from the following chart, using dimension E.
- Install the intermediate band.
- Install the intermediate band anchor strut.
- Check to make sure that the intermediate band anchor strut is installed in the correct orientation to the case and adjustment screw.
- Loosely install the screw.
- Install the intermediate band apply strut.
- Check to make sure that the intermediate band apply strut is installed in the correct orientation to the case and piston rod.
- Install the selected No. 4 thrust washer on the direct clutch drum.
- Coat the thrust washer with petroleum jelly.
- Install the center support.
- Install the center support locknut and cage.
- Loosely install the screw.
- Install the center support retaining ring.
- Make sure the center support retaining ring is installed with the tapered side facing up.
- Make sure the opening of the center support retaining ring is positioned correctly.
- Install the center shaft thrust bearing (No. 3).
- Install the overdrive ring gear, overdrive one-way clutch and center shaft assembly.
- Install the planetary gear overdrive carrier.
- Install the overdrive brake drum and coast clutch drum assembly.
- Install the overdrive band.
- Install the overdrive anchor strut.
- Check to make sure that the overdrive band anchor strut is installed in the correct orientation to the case and adjustment screw.
- Loosely install the screw.
- Install the overdrive apply strut.
- Check to make sure that the overdrive band apply strut is installed in the correct orientation to the case and piston rod.
- Install the special tool.
- Install the special tool and the bolts using the two pump screw locations at approximately 6 and 12 o'clock positions.
- Tighten the center screw.
- Measure the distance from the top of the gauge bar to the drum bearing surface through the hole in the disc and record as dimension A. Repeat measurement 180 degrees opposite side of the special tool and record as dimension B.
- Add dimension A to B, divide by two and record as dimension C.
- Subtract the thickness of the gauge bar 17.78 mm (0.71 in) from dimension C, and record as dimension D.
- Select the No. 1 thrust bearing from the following chart using dimension D.
- Install the selected No. 1 fluid pump input thrust washer.
- Coat the fluid pump input thrust washer with petroleum jelly.
- Install the special tools into the transmission case.
- Install the pump gasket.
- Install the fluid pump.
- Using the special tool, align the fluid pump to the adapter plate.
- Install screws. Tighten the screws in a star pattern.
- Remove the special tools and install the two remaining screws.
- Install a new locknut on the band adjustment screw.
- Using the special tool, tighten the overdrive band adjustment screw. Then back off the screw exactly (2) turns and hold that position.
- Tighten the overdrive band locknut.
- Hold the overdrive band adjustment screw stationary.
- Tighten the overdrive band locknut.
- Install new nut on the band adjustment screw.
- Tighten the intermediate band adjustment screw. Then back off the screw exactly (2) turns and hold that position.
- Tighten the intermediate band locknut.
- Hold the intermediate band adjustment screw stationary.
- Tighten the intermediate band locknut.
- Tighten the center support screw.
- Install the special tools into the transmission case.
- Install the main control valve body and loosely install the screws.
- Remove the special tools, and loosely install the screw.
- Tighten the screws in the sequence shown.
- With the manual lever in the NEUTRAL position, install the manual valve detent spring.
- Install new O-ring seals on the solenoid body connector. Lubricate the O-ring seals with clean automatic transmission fluid.
- Install the solenoid body. Tighten bolts in sequence shown.
- Install the reverse servo. Tighten the bolts in the sequence shown in two stages.
- Stage 1: Tighten bolts to 5 Nm (44 lb-in).
- Stage 1: Tighten bolts to 11 Nm (8 lb-ft).
- Lubricate the seals and install the transmission fluid filter.
- Install the transmission fluid pan and gasket and loosely install the screws.
- Tighten the 16 screws in a crisscross sequence.
- Install the parking pawl assembly and gasket.
- Install the parking pawl shaft.
- Install the parking pawl return spring.
- Install the parking pawl.
- Install a new gasket.
4x2 vehicles
- Install the extension housing.
- Using the special tool, install the extension housing seal.
4x4 vehicles
- Install the extension housing.
- Using the special tool, install the extension housing seal.
All vehicles
- Install the digital transmission range (TR) sensor and loosely install the screws.
- Using the special tool, align the digital TR sensor and tighten the screws in an alternating sequence.
- Install the outer manual lever.
- Install the input shaft.
- Using the special tool, make sure that the fluid pump gear seal ring is fully seated.
- Remove the special tool.
- Lubricate the converter hub with clean automatic transmission fluid.
- Using the special tools, install the torque converter by pushing and rotating.
- Lubricate the torque converter pilot hub with multi-purpose grease.
- If the vehicle is equipped, use the special tool to install the torque converter flex plate adapter assembly and eight nuts.
- Install two torque converter flex plate adapter nuts.
- Using one of the speed sensor holes, fill the transmission with 8.5L (9 quarts) of automatic transmission fluid.
- Install the sensors.
- Before installing transmission, make sure that the transmission cooling system (tube and cooler) have been thoroughly flushed. If contamination cannot be removed or correct flow cannot be obtained, install a new cooler and/or tubes. See REMOVAL & INSTALLATION .
CAUTION:
Make sure bearing seal ring is facing the drive handle.
WARNING:
Make sure the lock pin on bench-mounted holding fixture is secure. Failure to follow these instructions may result in personal injury.
CAUTION:
Align the flats on the manual valve inner lever with the flats on the manual control lever shaft.
CAUTION:
Use care not to damage the fluid pan rail surface when installing the retaining pin.
NOTE:
Align the manual control lever shaft alignment groove with the manual control lever shaft spring pin bore in the transmission case.
CAUTION:
To avoid damage, do not allow the wrench to strike the manual valve inner lever pin.
CAUTION:
The tabs on the output shaft thrust washer (No. 11) point into the case. Make sure the thrust washer is correctly seated.
CAUTION:
Make sure band is resting on the two anchor pins in the case.
NOTE:
The reverse band actuating lever must fit into the notches in the band.
CAUTION:
Do not damage the seal against the case during assembly.
CAUTION:
Always install a new output shaft retaining ring.
NOTE:
Install the output shaft sleeve with the cone facing up. This sleeve will snap into place when correctly installed.
CAUTION:
Make sure the needle bearings stay in place.
CAUTION:
The low/reverse brake drum must be pulled forward to install the low/reverse planet retaining ring.
NOTE:
The No. 13 bearing must be properly seated in the forward planet assembly so the sun gear can be installed correctly.
CAUTION:
The torque specifications are critical for this procedure. Failure to use the correct torque specifications may cause transmission damage.
NOTE:
Align the disc holes on special tool with the slot in gauge bar for correct measurement.
NOTE:
Make sure that the intermediate band apply strut is aligned with the band notch.
NOTE:
If the intermediate band is reused, it must be installed in the same position as when removed.
NOTE:
The intermediate band is new, and dark in color. This is a normal condition of the band. Hairline cracks in the band are also considered normal. Do not install a new band based solely on the color.
CAUTION:
If the strut is installed incorrectly, transmission damage will occur.
CAUTION:
If the strut is installed incorrectly, transmission damage will occur.
NOTE:
Align the center support screw hole with correct case hole.
CAUTION:
Install the center support retaining ring with the tapered side facing up.
CAUTION:
Make sure the notch opening is not obstructed by the center support retaining ring.
CAUTION:
Do not bend the trigger wheel. Make sure that the No. 2 thrust bearing is in this assembly.
NOTE:
If the overdrive band is reused, it must be installed in the same position as when removed.
NOTE:
Make sure that the overdrive band apply strut is aligned with the band notch.
NOTE:
The overdrive band is new, and dark in color. This is a normal condition of the band. Hairline cracks in the band are also considered normal. Do not install a new band based solely on the color.
CAUTION:
If the strut is installed incorrectly, transmission damage will occur.
CAUTION:
If the strut is installed incorrectly, transmission damage will occur.
CAUTION:
The torque specifications are critical for this procedure. Failure to use the correct torque specifications may cause transmission damage.
NOTE:
Align the disc holes on special tool with the slot in gauge bar for correct measurement.
CAUTION:
Make sure that the fluid pump inlet thrust washer (No. 1), selective thrust washer, fluid pump gasket, and the fluid pump-to-case O-ring seal remain in the correct position throughout this step.
CAUTION:
The special tools must be used to correctly align the pump with the adapter plate to reduce gear noise, bushing failure, and leakage.
CAUTION:
Do not allow overdrive band adjustment screw to back out. Band strut could fall out of position.
CAUTION:
Install, but do not tighten, a new locknut on the band adjustment screw. Apply petroleum jelly to the locknut seal.
CAUTION:
The overdrive servo must be installed prior to band adjustment.
CAUTION:
Do not allow the intermediate band adjusting screw to back out. Band strut could fall out of position.
CAUTION:
Install, but do not tighten, a new locknut on the band adjustment screw. Apply petroleum jelly to the locknut seal.
CAUTION:
The intermediate servo must be installed prior to band adjustment.
CAUTION:
Inspect the transmission case bore to make sure it is free of debris and not damaged. If damaged, transmission leak may occur.
CAUTION:
Lubricate the fluid filter seals with clean automatic transmission fluid or they may be damaged.
NOTE:
Make sure that the fluid filter seals are correctly seated on the filter.
NOTE:
The transmission fluid pan gasket is reusable. Clean and inspect for damage. If not damaged, the gasket should be reused.
NOTE:
The 4x2 is shown, the 4x4 is similar.
CAUTION:
The digital transmission range sensor must fit flush against the boss on the case to prevent damage to the sensor.
CAUTION:
Tightening one screw before tightening the other may cause the sensor to bind or become damaged.
NOTE:
The manual lever must be in the NEUTRAL position.
CAUTION:
The splines of the input shaft are not the same length on both ends. The shaft end with the shorter splines goes into the fluid pump.
CAUTION:
Do not damage the fluid pump gear O-ring seal when installing torque converter.
CAUTION:
Make sure the converter hub is fully engaged in the pump support and gear and rotates freely. Do not damage the hub seal.
CAUTION:
If the torque converter slides out, the hub seal may be damaged.
WARNING:
The torque converter can fall out if the transmission is tipped. Failure to follow these instructions may cause personal injury.
CAUTION:
The special tool must be used to correctly align the adapter plate to the converter or transmission damage could occur.
In order to correctly install the special service tool, it must be installed using one round and one oblong hole. Using two oblong holes will cause damage to the transmission.
In order to correctly install the special service tool, it must be installed using one round and one oblong hole. Using two oblong holes will cause damage to the transmission.
NOTE:
Align the identifying mark made on the nut, stud, and adapter plate during disassembly for correct installation.
NOTE:
Inspect O-ring seal for damage. Install new if damaged. Lubricate the O-ring seals with petroleum jelly to prevent damage to the O-ring seals.