Transmission Output Seal May Leak Fluid on GMC Jimmy

The transmission output shaft seal may leak transmission fluid. On 2WD models, this leak can cause the transmission mount to become oil soaked, which will require replacement of the mount along with the leak repair. On 4WD models, if this seal leaks, the fluid will leak into the transfer case, causing it to become overfull.

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Average mileage: 188,166 (137,434–275,900)
Drive Trains affected: 2WD, 4WD
7 model years affected: 1992, 1993, 1994, 1995, more1996, 1997, 1998
17 people reported this problem
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Viewing 1 - 5 of 5 problem details
1996 GMC Jimmy - 4WD 170,000 mi,
transmission fluid is now in side 4wd actuator vacuum
1997 GMC Jimmy - 4WD 197,000 mi,
tranny fluid leaks and I check the stick it says its only leaks when hot
1995 GMC Jimmy - 4WD 179,000 mi,
Got home from vacation to see a 4 foot wide transmission fluid river flowing from my car to my neighbors garage!!!!
1997 GMC Jimmy - 4WD 275,900 mi,
Fluid out of automatic transmission getting into transfer case
1997 GMC Jimmy - 4WD 197,000 mi,
transmission just above the transmission stick housing. I thought it was the o-ring replaced still leaking