Page 17-20-46
198917-20-46 Transmission, Automatic-AOD 17-20-46
REMOVAL AND INSTALLATION (Continued)
25. Install catalytic converter assembly.
26. Install exhaust pipe and muffler assembly.
27. Install body reinforcement.
28. 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.
29. Adjust the manual shift linkage as required. Refer to Section 17-02.
30. 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 Section 10-04.
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 lb.ft.).
4. Install detent spring and attaching bolt. Tighten to 9-11 N-m (80-100 lb.ft.).
5. Remove the guide pins and install 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 lb.ft.).
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 (6-10 lb.ft.).
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 TV linkage cable system as outlined under Linkage Adjustment.
Overdrive Servo Assembly Removal
1. Raise the vehicle on a hoist so the transmission oil pan is accessible. Refer to Section 10-04.
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. Retain band against drum with small flat object or screwdriver to prevent band movement during servo removal.
8. Depress overdrive servo piston cover with a hammer handle and remove the retaining snap ring.
9. 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.