A/T - AOD Fluid Leak
Article No. 85-24-7LEAK - TRANSMISSION FLUID (AOD) - FRONT PUMP SEAL
FORD 1980-85 FORD, THUNDERBIRD, LTD, MUSTANG
LINCOLN-MERCURY 1980-85 MERCURY, COUGAR, MARQUIS, CAPRI, LINCOLN, MARK, CONTINENTAL
LIGHT TRUCK 1982-85 E AND F SERIES, BRONCO
Figure 12 - Front Pump Seal:
Transmission fluid leaks at the front pump seal in vehicles equipped with an AOD transmission built prior to October 1, 1985 may be caused by a variation in location of the fluid drainback hole at the pump allowing fluid to leak around the seal. If the drainback hole bridges across the outer edge of the pump seal, the seal may collapse in the hole causing a leak past the outside diameter of the seal (Figure 12).
1. Remove the front pump seal using procedures outlined in Section l7-20-34 of the 1985 Car Shop
Manual, Volume D.
2. Check the relationship of the drainback hole at the pump body to the sealing face of the seal (Figure 12). If the hole bridges the seal metal face, thoroughly clean and dry the pump body seal mating surface with spot remover (B7A-19521-A).
Figure 14 - Front Pump Seal - Outside Diameter Metal Surface:
3. Obtain a new seal (C2AZ-7A248-A) and clean any oil that may be on the metal surface. Apply silicone sealant (E3AZ-19562-A) in a continuous 1/16" to 1/8" diameter bead to the outside diameter metal surface of the seal (Figure 14, Step 1). Distribute the bead of sealant into a thin film as shown.
NOTE: The silicone sealant is distributed in a cartridge tube. The nozzle should be cut to permit a flow of sealant 1/16" to 1/8" in diameter. Do not apply more than a 1/8" bead as the drainback hole could become plugged.
4. Apply a 1/16" to 1/8" diameter bead of sealant in the corner of the pocket of the pump body seal mating surface (Figure 14, Step 2).
NOTE: The bead must be adequate across the drainback hole but not plug the hole. If the hole is blocked, drainback behind the seal will not be provided and leakage could still occur.
5. Push seal in place and smear the excess sealant as shown in Figure 14, Step 3.
Figure 13 - Front Pump Seal/Revised Hole Location:
Transmissions built after October 1, 1985 are equipped with a front pump that has a revised drainback hole located away from the seal edge mating surface (Figure 13). Depot stock has been replaced with pumps having the revised location drainback hole.
PART NUMBER PART NAME CLASS
B7A-19521-A Spot Remover A
C2AZ-7A248-A Pump Seal A
E3AZ-19562-A Silicone Sealant A
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP7248A85
TIME: 3.4 Hrs. - Mustang/Capri, LTD/Marquis, Thunderbird/Cougar, Mark VII/Continental
2.8 Hrs. - Ford, Mercury, Lincoln 3.0 Hrs. - 4x2 F Series 4.9L/5.0L 2.7 Hrs. - 4x2 Econoline 4.9L/5.0L 4.3 Hrs. - 4x4 F Series and Bronco 5.0L
OPERATION: SP7248B85 - Supplement extra time if equipped with skid plate under the transfer case
TIME: 0.2 Hr. DLR. CODING: Basic Part No. 7A248 - Code: 77