A friend of mine raced a few stage rally seasons with an obx front in a fwd GC transmission, left foot braking definitely helps transfer power. They can be rebuilt fairly easy with upgraded bolts and washers. Using a dremel to clean up some of the cheap manufacturing flaws can go a long way as well. They are just too cheap not to tinker with. Being a straight quaife knock off they do the job pretty well, its the cheap production that causes problems. If you run one right out of the box expect some metal sludge on your drain plug.
Here's a decent post on DI with info on rebuilding an obx.. loren also installs a beefy vlsd center as well (interesting read even if you don't want to go with an obx):
Edited by Ibreakstuff, 19 November 2012 - 07:01 PM.