Quote:
Originally Posted by pknopp
Yes, as I said above the first thing I would do is check adjustment. It seems scary and daunting until you realize it's really not.
If the rods are not adjusted right it will want to slip, not shift and just act like it's not going to last much longer.
Also, luckily the 57 was the first year with the availability of wide range of rear end gears and posi. The are still highly sought after by the vintage drag racing guys.
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I think 1958 was the first year for a Pontiac posi. The 57 and 58 both used 29 spline axles. 59 thru 64 used 31 splines. I'm pretty sure these later carrier assemblies will fit a 57 housing
and you can use the 57 axles if you change out the side gears, which (I think, maybe) are now being produced.