My buddy just bought complete diffs w/lockers for his truck and now has a spare set of front and rear 4cyl. turbo diffs with factory 4:38 gears. i was wondering if the truetrac in my V6(1989) rear diff will fit into one of the turbo diffs. If so my buddy is gonna give me his old turbo diffs cheap.

 

The Turbo/V6 rear diff is the same thing, so everything is swappable. A turbo front diff would be for IFS, but you're probably referring to a Turbo rear diff being used in the front of a SAS rig.