Pages 17-20-46 Thru 17-20-49
17-20-46 Transmission, Automatic-AOD
REMOVAL AND INSTALLATION (Continued)
24. Tighten axle assembly rear mounting nuts to 165-211 N-m (122-156 ft.lbs.).
25. Position vent tube in hole of sub-frame.
26. Align driveshaft yoke and companion flange index marks and install retaining bolts. Tighten to 95-129 N-m (70-95 ft.lbs.).
NOTE: Ensure driveshaft yoke and companion flange are free of nicks, burrs and contamination.
27. Install catalytic converter assembly.
28. Install exhaust pipe and muffler assembly.
29. Install body reinforcement.
30. Lower vehicle and fill the transmission to the correct level with the specified fluid. Start the engine and shift the transmission to all ranges, then check the fluid level. Refer to Transmission Fluid Level Check.
31. Adjust the manual shift linkage as required. Refer to Section 17-02.
32. Adjust TV linkage, as outlined.
Main Control Valve Body Removal
1. Raise the vehicle on a hoist so the transmission fluid pan is accessible. Refer to Pre-Delivery manual, Section 50-04.
NOTE: Some vehicles may require the removal of interfering exhaust system components.
2. Starting at the rear and working toward the front, loosen the oil pan attaching bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet and a 10 mm universal socket to remove the oil pan bolts. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if the fluid is in good condition.
3. Remove the transmission oil pan attaching bolts, pan and gasket. Discard gasket.
4. Remove three filter-to-valve body attaching bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid is contaminated, discard the filter. (Do not clean the filter).
5. Remove the detent spring attaching bolt and spring.
6. Remove the valve body-to-case attaching bolts. Remove the valve body. Discard valve body-to-case gasket. Installation
1. Clean and inspect the valve body as outlined in this Section.
2. Using Valve Body Guide Pins T80L-77100-A or equivalent, position the valve body to the case, making sure that the inner manual lever and inner TV levers are engaged.
3. Install valve body-to-case attaching bolts. Tighten to 9-11 N-m (80-100 ft.lbs.).
4. Install detent spring and attaching bolt. Tighten to 9-11 N-m (80-100 ft.lbs.).
5. Remove the guide pins and install and tighten the remaining two attaching bolts, 6. Load TV lever torsion spring against the separator plate.
7. Using three filter attaching bolts, install the filter and gasket to the valve body, Tighten attaching bolts to 9-11 N-m (80-100 ft.lbs.).
8. Clean the transmission oil pan and gasket surfaces thoroughly.
9. Using a new oil pan gasket, secure the pan to the transmission case. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10 mm socket to install the oil pan bolts. Tighten the attaching bolts to 8-13.5 N-m (6-9 ft.lbs.).
10. Lower the vehicle and fill the transmission to the correct level with the specified fluid. Start the engine and shift the transmission to all ranges, then recheck the fluid level. Refer to Transmission Fluid Level Check procedure.
11. Adjust the linkage rod or cable system as outlined under Linkage Adjustment.
17-20-47 Transmission, Automatic-AOD
REMOVAL AND INSTALLATION (Continued)
Overdrive Servo Assembly
Removal
1. Raise the vehicle on a hoist so the transmission oil pan is accessible. Refer to Pre-Delivery manual, Section 50-04.
NOTE: Some vehicles may require the removal of interfering exhaust system components.
2. Starting at the rear and working toward the front, loosen the oil pan attaching bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10 mm universal socket to remove oil pan bolts. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if the fluid is in good condition.
3. Remove the transmission fluid pan attaching bolts, pan and gasket. Discard gasket.
4. Remove three filter-to-valve body attaching bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid is contaminated, discard the filter. (Do not clean the filter).
5. Remove the detent spring and attaching bolt.
6. Remove the valve body-to-case attaching bolts. Remove the valve body. Discard valve body-to-case gasket.
7. Depress overdrive servo piston cover with a hammer handle and remove the retaining snap ring.
8. Using Servo Piston Remover T80L-77030-B or equivalent, apply air pressure to the servo piston release passage in order to remove the overdrive servo piston cover and spring. Remove the piston from the cover.
9. Remove the rubber seals from the piston and the cover.
Installation
1. Clean and inspect the servo piston and cover for nicks and/or burrs. Clean and inspect the servo piston pocket in the case for nicks and burrs also.
2. Install new servo piston and cover seals on the piston and cover, respectively.
3. Lubricate the piston seals with either clean transmission fluid or a petroleum jelly.
4. Install the servo piston into the cover, lubricate the cover seals and the overdrive servo pocket in the case.
5. Assemble the return spring to the servo piston.
6. Install the overdrive piston cover and spring into the overdrive servo pocket in the case. Make sure the servo rod contacts the overdrive band apply pocket. Failure to do so will result in a no 3-4 shift condition.
7. Using the handle of a hammer, depress the overdrive servo sufficiently to gain clear access to the retaining snap ring groove in the case. Install the snap ring.
8. Inspect the outer edge of the overdrive servo pocket for possible nicks and burrs which might have been raised during the removal or installation of the retaining snap ring.
9. Remove nicks and burrs with a fine honing stone and clean the affected areas thoroughly. Failure to do so may cause improper seating of the valve body separator plate to the hydraulic passages in the case, and subsequent cross leakage.
10. Clean and inspect the valve body as outlined in this Section.
11. Position a new separator plate gasket to the separator plate.
12. Using Valve Body Guide Pins T80L-77100-A or equivalent, position the valve body to the case, making sure that the inner manual lever and inner TV lever are engaged.
13. Install valve body-to-case attaching bolts. Tighten to 9-11 N-m (80-100 in.lbs.).
14. Install the detent spring and attaching bolts.
15. Remove the Valve Body Guide Pins T80L- 77100-A or equivalent and install valve body to the case. Tighten the remaining two valve bodyto-case bolts.
16. Position the TV lever torsion spring against the separator plate.
17. Using three filter attaching bolts, install the filter and gasket to the valve body. Tighten attaching bolts to 9-11 N-m (80-100 in.lbs.).
18. Clean the transmission oil pan and gasket surfaces thoroughly.
19. Using a new oil pan gasket, secure the pan to the transmission case. Tighten the attaching bolts to 8-13.5 N-m (6-9 ft.lbs.).
20. Install any exhaust system hardware that might have been removed.
21. Lower the vehicle and fill the transmission to the correct level with the specified fluid. Start the engine and shift the transmission to all ranges, then recheck the fluid level. Refer to the Transmission Fluid Level Check procedure.
22. Adjust TV linkage rod or cable system as outlined under Linkage Adjustment.
Low-Reverse Servo Assembly
Removal
1. Raise the vehicle on a hoist so the transmission fluid pan is accessible. Refer to the Pre-Delivery manual, Section 50-04.
NOTE: Some vehicles may require removal of interfering exhaust system components.
17-20-48 Transmission, Automatic-AOD
REMOVAL AND INSTALLATION (Continued)
2. Starting at the rear and working toward the front, loosen the oil pan attaching bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10 mm universal socket to remove the oil pan bolts. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if the fluid is in good condition.
3. Remove the transmission oil pan attaching bolts, pan and gasket. Discard gasket.
4. Remove three filter-to-valve body attaching bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid is contaminated, discard the filter. (Do not clean the filter).
5. Remove the detent spring and attaching bolt.
6. Remove the valve body-to-case attaching bolts. Remove the valve body. Discard valve body-to-case gasket.
7. Depress the reverse servo piston cover with a hammer handle as shown. Remove the retaining snap ring and piston cover.
NOTE: Care must be taken to prevent reverse servo piston from springing free from case when cover is removed.
8. To remove the reverse servo piston and spring, apply air pressure to the servo piston release passage using Servo Piston Remover T80L- 77030-B or equivalent. Cover the servo piston pocket to prevent the piston from falling out from the case when air is applied and becoming damaged.
Installation
1. Clean and inspect the servo pocket in the case.
2. Clean the reverse servo piston, cover and return spring. Inspect the piston and cover sealing edges for cuts, burrs or irregular wear pattern. Replace if necessary.
3. Assemble the return spring to the servo piston.
4. Install the reverse servo piston and spring, and the servo cover into the case reverse servo pocket.
NOTE: Make sure that the servo piston is reinstalled with the same rod length as the one which was removed.
5. Using the handle of a hammer, depress the reverse servo piston and cover sufficiently to gain clear access to the retaining snap ring groove in the case. Install the snap ring.
6. Inspect the outer edge of reverse servo pocket for nicks or burrs which might have been raised during the removal or installation of the retaining snap ring.
7. Remove nicks or burrs with a fine honing stone and clean the affected surfaces thoroughly. Failure to do so may cause improper seating of the valve body separator plate to the hydraulic passages in the case, and subsequent crossleakage.
8. Clean and inspect the valve body as outlined in this Section.
9. Position a new valve body gasket to the separator plate.
10. Install Valve Body Guide Pins T80L-77100-A or equivalent to the case. Position a new separator plate gasket to the valve body and case, making sure that the inner manual lever and inner TV lever are engaged.
11. Install valve body-to-case attaching bolts. Tighten to 9-11 N-m (80-100 in.lbs.).
12. Install the detent spring and attaching bolt. Tighten to 9-11 N-m (80-
100 in.lbs.).
13. Position the TV lever torsion spring agiinst the separator plate.
14. Remove the Valve Body Guide Pins T80L- 77100-A or equivalent and install valve body to the case. Tighten the remaining two valve body attaching bolts.
15. Using three filter attaching bolts, install the filter and gasket to the valve body. Tighten attaching bolts to 9-11 N-m (80-100 in.lbs.).
16. Clean the transmission oil pan and gasket surfaces thoroughly.
17. Using a new oil pan gasket, secure the pan to the transmission case. Tighten the attaching bolts to 8-13.5 N-m (6-9 ft.lbs.). It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10 mm universal socket to install the oil pan bolts.
18. Install any exhaust system components that might have been removed.
19. Lower the vehicle and fill the transmission to the correct level with the specified fluid. Start the engine and shift the transmission to all ranges. Refer to Transmission Fluid Level Check procedure.
20. Adjust the TV linkage rod or cable system as outlined under Cable Adjustment.
3-4 Accumulator Piston
Removal
1. Raise the vehicle on a hoist so the transmission oil pan is accessible. Refer to the Pre-Delivery manual, Section 50-04.
NOTE: Some vehicles may require the removal of interfering exhaust system components.
2. Starting at the rear and working toward the front, loosen the oil pan attaching bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet and a 10 mm universal socket to remove the oil pan bolts. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if the fluid is in good condition.
3. Remove the transmission oil pan attaching bolts, pan and gasket. Discard gasket.
17-20-49 Transmission, Automatic-AOD
REMOVAL AND INSTALLATION (Continued)
4. Remove the filter-to-valve body attaching bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid was contaminated, discard the filter.
5. Remove the detent spring and attaching bolts.
6. Remove the valve body-to-case attaching bolts. Remove the valve body. Discard valve body-to-case gasket.
7. To remove the 3-4 accumulator piston, depress the cover and remove the retaining snap ring.
8. Slowly release the tension on the 3-4 accumulator cover, allowing the removal of the piston cover, return spring and piston. (Some models may not use a spring).
9. If necessary, apply air pressure to the hydraulic apply passage using Servo Piston Remover T80L-77030-B or equivalent.
10. Remove the seals from the 3-4 accumulator cover and piston. Inspect seals for possible nicks, cuts or irregular wear patterns. If damaged, discard the seals.
Installation
1. Thoroughly clean and inspect the 3-4 accumulator piston and cover.
2. Install new seals on the 3-4 accumulator piston and cover.
3. Thoroughly clean and inspect the accumulator pocket in the case.
4. Lubricate the rubber cover seal and the cover pocket of case with either clean transmission fluid or a petroleum jelly.
5. Reinstall the 3-4 accumulator piston (and return spring) into the case. Install the cover.
6. Depress the cover into piston pocket sufficiently to allow clear access to the snap ring groove in the ID of the pocket.
7. Install the retaining snap ring.
CAUTION: Cover must then be reseated snug against retaining ring.
Inspect the outer edge of the 3-4 accumulator piston pocket for nicks or burrs which might have been raised during the removal or installation of the retaining snap ring.
Remove nicks or burrs with a fine honing stone and clean the affected surfaces thoroughly. Failure to do so may cause improper seating of the valve body separator plate to the hydraulic passages in the case, and subsequent crossleakage.
8. Clean and inspect the valve body gasket to the separator plate.
9. Position a new valve body gasket to the separator plate.
10. Using Valve Body Guide Pins T80L-77100-A or equivalent, position the valve body to the case, making sure that the inner manual lever and inner TV lever are engaged.
11. Install valve body-to-case attaching bolts. Tighten to 9-11 N-m (80-100 in.lbs.).
12. Install detent spring and attaching bolt. Tighten to 9-11 N-m (80-100 in.lbs.).
13. Remove the Valve Body Guide Pins T80L- 77100-A or equivalent, and install the two remaining valve body attaching bolts.
14. Position the TV lever torsion spring against the separator plate.
15. Using three filter attaching bolts, install the filter and gasket to the valve body. Tighten attaching bolts to 9-11 N-m (80-100 in.lbs.).
16. Clean the transmission oil pan and gasket surfaces thoroughly.
17. Using a new oil pan gasket, secure the pan to the transmission case. It may be necessary to use a 3/8-inch drive ratchet with a 10 mm universal socket to install the oil pan bolts. Tighten the attaching bolts to 8-13.5 N-m (6-9 ft.lbs.).
18. Install any exhaust system components that might have been removed.
19. Lower the vehicle and fill the transmission to the proper level with the specified fluid. Start the engine and shift the transmission to all ranges, then recheck the fluid level. Refer to Transmission Fluid Level Check procedure.
20. Adjust TV linkage rod or cable system as outlined under Linkage Adjustment.
2-3 Accumulator Piston
Removal
1. Raise the vehicle on a hoist so the transmission oil pan is accessible. Refer to Pre-Delivery manual, Section 50-04.
NOTE: Some vehicles may require the removal of interfering hardware.
2. Starting at the rear and working toward the front, loosen the oil pan attaching bolts and drain the fluid from the transmission. It may be necessary to use a 3/8-inch or 1/4-inch drive ratchet with a 10 mm universal socket to remove the oil pan bolts. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if the fluid is in good condition.
3. Remove the transmission oil pan attaching bolts, pan and gasket. Discard gasket.
4. Remove the three filter-to-valve body attaching bolts and remove the filter, grommet and gasket. Discard gasket. If the fluid is contaminated, discard the filter. (Do not clean the filter).