External Sealing

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

The pump housing has a cassette-type seal for the torque converter impeller hub that is pressed into the pump and bonds itself to the torque converter hub surface during operation. The pump assembly uses a large rubber seal that seals the pump housing to the transmission case. The pump body uses a rubber seal that seals the pump body to the pump housing.

The manual control shaft has a lip seal that is pressed in the transmission case.

The transmission fluid pan and the Power Take-Off (PTO) cover use a reusable gasket.

The Four-Wheel Drive (4WD) and Rear Wheel Drive (RWD) fixed flange applications use a lip-type seal that seals the transmission case to the output shaft nut. There are also 2 plugs in the back of the transmission case that have a seal that is part of the plug.

The RWD slip yoke application uses an O-ring seal that seals the extension housing to the transmission case and a lip-type seal that seals the extension housing to the driveshaft.

On the left side of the transmission case, there is a line pressure tap plug with a seal that is part of the plug.

The large transmission case housing plug provides access to the park pawl shaft and has an O-ring seal.

The internal wiring harness bulkhead connector has an O-ring seal for the transmission case bore.

The transmission fluid filler tube uses an O-ring seal.

The transmission fluid cooler tubes use 4 O-ring seals to seal the tubes to the transmission case.

The transmission fluid drain plug has a bonded rubber seal.

Fig 1: Identifying Transmission Components (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Transmission Components (2 Of 2)

Courtesy of FORD MOTOR CO.

Item	Description
1	Torque converter hub seal
2	Pump body seal
3	Pump housing seal
4	Power Take-Off (PTO) gasket
5	Line pressure tap plug
6	Manual control shaft seal
7	Internal wiring harness bulkhead connector O-ring
8	Transmission fluid pan gasket
9	Drain plug
10	Output shaft seal (slip yoke)
11	Extension housing seal (slip yoke)
12	Output shaft seal (Four-Wheel Drive (4WD) and Rear Wheel Drive (RWD))
13	Output shaft nut
14	Slip yoke bushing oil feed plugs (2 required, for fixed flange and 4WD applications)
15	Park pawl shaft plug O-ring
16	Transmission fluid cooler tube O-rings (4 required)
17	Transmission fluid filler tube O-ring
18	Transmission vent tube