Yes, the donor trans has to be from a '37-'38 series 60, 80, or 90 car with the 6 bolt top cover. The article I read says '35-'37 GM big cars, but I've looked at some '35-'36 transmissions and I don't think that is correct. As you state, the '37-'60 transmissions with the 6 bolt top cover are all the same, but only the '37-'38 had the floor shifter. To convert a '57 trans to floor shift I know I need the 6 bolt top cover and shifter handle from the '37-'38 trans, but do you know if I need any other internal parts from the '37-'38 trans? Just trying to put together a shopping list of '37-'38 parts. The smaller and weaker transmission had the 5 bolt top cover. I think the last year for the 5 bolt top cover trans was 1955. This article on "55-60 transmission interchange" (from a Pontiac perspective) says that the 6 bolt top cover shifter will also fit the weaker 5 bolt top cover transmissions:
http://www.members.tripod.com/starch...htips.htm#gear
Sean Smith
BCA# 42746
MBCC# 2122
SAH# 4186
Buickman Award 2015
1957 Special 4-door Riviera (hardtop) model 43
Bookmarks