After reading the many posts here about clutch issues I thought I would let you guys know about this company http://www.southbendclutch.com/dynamax.html They are well known in the high H.P. diesel truck world for building some of the stongest & best clutches available. If you have a slipping clutch I would give them a call. They built an awsome custom clutch for my F-350 Crew Cab with a 7.3L that is far from stock and it has not slipped once!