Originally Posted by
ShiftyOldScoob
As above really.....
I'm running approx 400bhp, t34.63, siemens black 55s etc
My diff had sprong a leak and I didnt notice so now its started to whine
Cant decide weather to buy another standard diff or to buy something a little special
If people could give me advice based on their experiences that would be much appreciated
Many Thanks

Thanks! I have exactly the same problem. My Cossie has the same spec (t34.55) and I broke the 7,5" diff driving out of a roundabout in 2nd gear no clutch, boost was rising to "just" 1,8 bar and BANG the diff was gone.
It would be very interesting to hear what diff to buy. I am using the car for occasionally race and drift, and not as a daily used car.
What diff is good for this purpose for a reasonable price?