Originally Posted by Dragncar
What kind of 4 speed did you break. I was a diehard 4 speed guy. Broke Muncies and went to Ford Top Loader. Never broke one of them. But when I got into drag race only put a T400 in.
Broke them too, broke many Ford 9" also.
Finally put a 40 spline big pinion pro gear full back brace deal in. So for it has held up.
I broke the mainshaft on a Toploader. It is for sale on the other site. Bought a new shaft and its back together. I had Liberty gear make me an input shaft for a fine spline GM, had the bearing retainer milled to fit a gm bellhousing. It is a close ratio 31 spline. It was out of a 69 Fairlane 428 car. RUG AG.
I must say it held up better than any tranny I had in there. I broke a t10, the TKO 600 2 times. My car is heavy and makes decent h.p. and torque.
I have a nice built th 400 going in.