Hi,

My rear diff came from a donor car that was fitted with a 4 speed auto box, are the diff ratios the same or am I facing an issue here and should source a new diff before final assembly?
I will be using a type 9 gearbox.

just work out what diff you have just count and devide the crown wheel and pinion gears to get you ratio i used to run 3.77 diff type 9 box 2.0 zetec

[Edited on 4/4/13 by JAMSTER]