Cheap diff upgrades
As many of you know I am planning on replacing my T5 with some sort of heavy duty auto tranny. The big problem is that I'd lose a lot of performance if I did it now (and I can't throw afford any time/money for it just yet anyway). I've decided that to make the car better to drive in the meantime, I should start with the diff.
What I'm wondering is whether upgrading the diff gears is as simple as getting a cheap R31 Skyline or similar diff and throwing the gears into my existing housing? I think QuikCorty did something similar when he upgraded his, except using VL gears?
I don't have a need to convert to LSD at this stage but will have to do it later.
Depending on the R31 ratio (I've heard 3.7 or 3.9 from different sources) I'm aware that I'd have speedo accuracy problems as well which could be tricky to rectify.
Any opinions or advice appreciated.
PS the existing diff is a 3.08 28 spline ED item.
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S