Anyone got a decent 3.89 diff they want rid of
Known good one
Currently running a 4.1 but need longer legs for the new engine
Live central area but travel with work
Thanks

Approx estimate a 4.1to 3.9 diff swap will give you about 1 mph per 1000 revs in top gear more top end not sure if that's enough for you a3.7 maybe a better ratio for more top end .

I have one took it out befor running it, fitted a 4.1 instead
I'm nr Castleford
Would do you a swap

[Edited on 31/7/14 by Trollyjack]

Hi Got a 3.89 if you still need one Aylesbury area