I have a neighbor who has a 1990 loyale wagon with a 3 spd auto, four wheel drive tranny. She had the tranny rebuilt last year and since then has blown two front seals out. They come right out of the seat. Any ideas as to why this might be happening? My thought was that the tranny was heating up and the seal softening and comming out, but I wanted to have som other ideas to look at when I tear it apart again this weekend. We are using OEM seals.

 

Thanks

Take a look if the seal was pressed into its location a bit too deep, there is a drain back in the seal mounting location at the bottom, if the seal is pressed in too far it can block the drain back.

I have a neighbor who has a 1990 loyale wagon with a 3 spd auto, four wheel drive tranny. She had the tranny rebuilt last year and since then has blown two front seals out. They come right out of the seat. Any ideas as to why this might be happening? My thought was that the tranny was heating up and the seal softening and comming out, but I wanted to have som other ideas to look at when I tear it apart again this weekend. We are using OEM seals.

 

Thanks

I would take a good look at the vent for the tranny. If it's plugged, it could cause the seal to come out from to much internal pressure in the tranny.