I just bought some NOS parts to build up a 3 speed transmission for the '50, but now am questioning whether I have the right casing. The right number for the car is Group 4.103 # 591746. (fitment '49-'54)
I have 2 trannys both with case number 591747. I cannot find application of this number anywhere in my '42-' 58 Canadian Pontiac interchange manual. The mainshaft I bought is the right number, but comparing it to the gearbox I have apart it is shorter. Any clues??
"The ID numbers needed are stamped into the case at the front edge of the cover. The number would begin with a M or S (plant where made) than three or four numbers which are the month and day. The year is not used. The late 1953 began with M 8-18 and S-8-26 which would be Aug. of 1953. The raised casting number on the case would be 591747 for a car 591615 for a truck."
"The ID numbers needed are stamped into the case at the front edge of the cover. The number would begin with a M or S (plant where made) than three or four numbers which are the month and day. The year is not used. The late 1953 began with M 8-18 and S-8-26 which would be Aug. of 1953. The raised casting number on the case would be 591747 for a car 591615 for a truck."
Good info. Thanks!
So I guess I have '53 transmissions? The stamping however on the one that's apart reads E 29 2. Maybe that means Feb. '54??
It's quite conceivable that at least one trans.dates around there because I swapped out my original motor in 1975 with a '53-54 and it came with a tranny.
The puzzling thing is the different mainshaft lengths. The photo shows the NOS shaft w/box (right part according to the book) marked 'long' by someone,
but the one beside it is original from the 591747 case. Perhaps the 591746 case is shorter??
Hi Dale:
Nobody other than you replied, but 22-07 is : Series 22 Model 07 (Coupe- Dynamic 2 Door).
Mine is 22-71 Series 22- Model Sedan Delivery.
The 20 & 22 series were on a 115" wheelbase. The series 25 & 27 were on a 120" WB.
Take a look at the first few pages of your parts book which may have the breakdowns. My book is No.445 ('42'-'56) and that's where I'm finding these specs.