thanks shoellnasty and John, Im not too familiar with teh subys so sounds like that center diff is the part you want to baby. The All-Trac Celica comes with a 5spd tranny that reasembles a FWD tranny but has connector in the rear of the tranny that the drive shaft for the rear attaches too, Kinda like the Mitsu GTX. Is the Center Diff that you talk about in the tranny itself?