Excessive Vibration Felt in Vehicle while Driving - Fluid Leaks from Rear of Transmission on Ford E-250

Problem Description and Possible Solution

This concern relates to vehicles equipped with the E4OD and 4R100 automatic transmissions. Fluid leaks from the rear of the transmission and excessive vibration felt in the vehicle while driving can be caused by a lack of lubrication to the rear of the transmission and rear seal failure. The extension housing (rear portion of transmission) can lose lubrication if the fluid supply hole becomes clogged. This leads to rear seal failure from lack of lubrication, and can cause bearing failure in the extension housing. The extension housing and gasket should be replaced and verify the fluid supply hole is clear of debris.

Problem Data
RepairPal Verified
Average mileage: 278,000 (278,000–278,000)
12 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
13 people reported this problem
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When my vehicle is under a load the overdrive light starts to Blink and it feels like something pulling it back and realize I do have a leak in the tail shaft also