hey everyone ive just purched two 9" diffs for my vk calais. im runnin a injected 304 with a 4 spd th700. one diff has 4.11s and the other has 3.9s. whitch gears do i choose???? what will be the best with the 4 spd box.. will the 4.11s still be good on the hiway with the overdrive???
go the 4:11's
i agree with v8 commy go the 4.11's it will probably be like driving a 3 speed with 3.08s on the highway if not a little lower depending on wheel sizes.
4.11 definately