Swapped in a 3.63 R/P into my diff so the 4.07 R/P out of my old diff is for sale. Both parts in very good shape. This was the R/P out of the early RX-7 GSL SEs and fits 1.8 diffs as I was running this in my 1.8 diff. There are 53 teeth in the ring gear and 13 teeth in the pinion gear.

$100 shipped.

 

Need to get crap out of my basement before I move. Bump.

 

is it much different than my 4.10? i can't imagine you would be able to feel a difference

 

Doesn't do you a damn thing. I figure if there is someone doing an Rx7 diff swap or Torsen that has a 4.30 might be worth it since 3.9 and 3.63 are harder to find.

 

I just contacted TrickerZ. He's got a WTB for those gears.