Quote:
Originally Posted by dre99gsx
More like 700hp+ but who's counting 
I've rebuilt the diff a few times already, fresh Motul 75W90 300 gear oil in there actually. I do have all the bottom pans on, one which enables fresh air to hit the fins directly.
I suspect my sewer pipe of an exhaust runs very close to that area, could be causing additional heat.
The center bushing is oval, and so is the stock bushing. It is supposed to be installed horizontally, but I don't know the reason. It is aluminum as well.
I have a Quaife in there, no clutch, and backlash was set at .003", within spec.
The melting is more excessive on the diff housing side than on the exhaust pipe side, thus I agree this is probably diff heat. I wonder if more fins would help... |
Preface...I am no expert....but riding along in a lot of BMWCCA events I've noticed that most of the the track dedicated and instructor cars (E46, E36, vettes) all focus on having a diff cooler in the mix. I think it would be worth looking into given the extensiveness of your build already.