Will a '57 Dynaflow bolt up to a '55 drivetrain?

I have a '55 Special and have a chance to pick up a rebilt '57 trans for a very reasonable cost.

Not easily. The bell housing on the 57 is smaller. It uses a flex plate rather than a flywheel. The ring gear is on the torque converter rather than the flywheel. I think the length is different and the drive shaft uses two universals with a different spline pattern so the 55 rear won't connect to the 57 trans..........Bob

Not easily. The bell housing on the 57 is smaller. It uses a flex plate rather than a flywheel. The ring gear is on the torque converter rather than the flywheel. I think the length is different and the drive shaft uses two universals with a different spline pattern so the 55 rear won't connect to the 57 trans..........Bob

Bob, your stuttering is getting worse, maybe you should have it checked into.

DUHHHHHHHHHHH! It's Deja-vu, all over again......

I would have a '55 trans as a parts donor if that is a help. The connection to the prop shaft seems like it would by just a U joint change and perhaps I could use the bell housing from my '55. The ring gear seems like it might be a killer though you did say not easily implying that it is possible.

Well I guess anything is possible given enough time, money, and effort. I guess the next question is why do it. There is little difference between a 55 and 57 trans, besides the size. The 57 was made smaller to accomadate a 2" lowering of the body line.........Bob

I was thinking to pick it up as a spare as it seems to be recently rebuilt and I am not sure how solid mine is.

Unless you get it really reasonably it's not much use to you except maybe trade goods........Bob

I'm thinking it is not worth getting as about it's good for is internal parts. He's asking $200 and it's susposed to have about 500 miles on the rebuild. It was replaced by a 350/350 drivetrain.

$ 200 doorstop???????????

I guess that eliminates all doubt. Thanks for the advice and info.

Wish it would have been otherwise but it is what it is...........Bob

Still need a replacement Ujoint 51 Buick Dynaflow .. it's lose as a goose .. all the usual suspect parts suppliers are "sorry" out of stock ... any thoughts??

bobdoss@cox.net