Can anybody tell me what the difference is between the box with FE1 and the one without? This is a 92 RS V6 T5 with FE1 suspension option.

Additionally, what's the best rebuilt gear box to buy for stock fit and feel with the best quality rebuild. (Cardone, Master Pro, etc)? I don't have the time or place to rebuild my existing one that has 450,000 miles on it..

Thanks....