Re: M5R2 transmission?
I don't know why they would design a tranny out of aluminum other than to reduce sprung weight and increase fuel efficiency.
Are you aware of how many trannys have aluminum cases?
70 Maverick Grabber, 5.0 (Perf. RPM heads, RPM intake, 625 Street Demon, Comp XE266HR roller cam, EDIS/Megajolt ignition, long headers), T5Z w/Steeda TriAx shifter, 9" Trac Loc w/3.89:1, 31 spline axles.