umm, how often do these half to be replaced?

They usually last longer than the rest of the tranny

Besides that, you can't replace them without splitting the tranny casing - so basically it means a complete rebuild.

 

GD

Negatory. The front diff is seperate from the tranny and can be removed. It will be a PIA to get back together because of the plumbing and gaskets. I looked into this when I was having so many problems with the 3AT in my T-Coupe. The front diff can be replaced when it starts eating up govenors. But it was easier just to replace the whole tranny

Oh yeah - forgot about the A/T's being two-peice....

 

GD