External Sealing

WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Transmission External Sealing Components

Courtesy of FORD MOTOR CO.

ITEM DESCRIPTION

Item	Part Number	Description
1	7902	Torque converter assembly
2	7A248	Front pump seal
3	7A248	Front pump seal
4	7A136	Pump gasket
5	7N134	Front pump sealing bolt
6	7A020	Transmission fluid level indicator
7	7A228	Transmission fluid filler tube assembly
8	391308-S	Transmission fluid filler tube O-ring
9	7A160	Short transmission fluid inlet tube assembly
10	7005	Case
11	7Z276	Bulkhead connector O-ring seal
12	7G276	Bulkhead connector and harness
13	7M101	Turbine Shaft Speed (TSS) sensor (model-dependent)
14	7Z101	O-ring seal
15	7086	Extension housing gaskets
16	7A039	Slip yoke extension assembly
17	7H103	Output Shaft Speed (OSS) sensor
18	7Z101	O-ring seals
19	7052	Extension housing seal
20	7085	Transmission output shaft retainer
21	7052	Extension housing seal
22	7A039	Fixed yoke extension housing
23	7222	Power Take-Off (PTO) - case cover
24	7223	PTO - cover gasket
25	7B498	Manual control lever seal
26	390685-S	Plug - test port - 1/8-27 hex head
27	7A191	Transmission fluid pan gasket
28	7A194	Transmission fluid pan
29	6730	Transmission fluid pan drain plug

Stop leakage at the transmission fluid pan gasket by tightening the transmission fluid pan-to-case bolts to specification. Refer to TORQUE SPECIFICATIONS in this service information. If necessary, install a new transmission fluid pan-to-case gasket only if the gasket is damaged.

If leakage is found by the solenoid body connector, refer to SOLENOID BODY ASSEMBLY in this service information.

When transmission fluid is found to be leaking between the transmission case and the transmission fluid cooler tube case fitting, tighten the fitting to maximum specification. Refer to TORQUE SPECIFICATIONS in this service information.

NOTE: Do not attempt to stop the transmission fluid leak by increasing the torque beyond specification. This can cause damage to the case threads or case fittings.

If the leak continues, install new transmission fluid cooler tube case fittings and tighten to specification. Follow the same procedure for transmission fluid leaks between the auxiliary transmission fluid cooler and the auxiliary transmission fluid cooler tube fittings.

If leakage is found at the manual control lever shaft, install a new seal.

Check for transmission fluid leaking from the end of the extension housing. Leakage can result from a damaged seal, missing garter spring, worn extension bushing, damaged Output Shaft Speed (OSS) sensor O-ring or the output shaft retainer (vehicles equipped with a fixed yoke). Install a new seal assembly as necessary.

Inspect the line pressure plug for leakage. Make sure it is tightened to specification. Refer to TORQUE SPECIFICATIONS in this service information. If tightening the line pressure plug does not stop the leak, the case threads and/or line pressure plug could be damaged. Remove the line pressure plug and inspect the line pressure plug and case thread for damage. Repair as necessary.