Posi-traction in 55 Olds rearend
#3
Nope, as stated no Posi until 1957. Your pumpkin is different and will not accept a 57 Posi even if you could find one. There is a aftermarket unit that will fit the 58 and up with 32 splines so if you wanted posi you would need to go with a 58 thru 64 housing and retro fit into you 56. or use a later GM setup that matches your width but your bolt pattern would change in the rear
Thread
Thread Starter
Forum
Replies
Last Post