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Post Info TOPIC: Anyone got a parts interchange book for this tranny number?


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Anyone got a parts interchange book for this tranny number?


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??

I'm wondering if the #591747 is Chevy only.



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Spotted this on a site

"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.



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Greaser wrote:

Spotted this on a site

"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??



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Addicted!

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Hi Murray

By any chance did anyone get back to you with more information on the shafts in your transmission?

I found the part number 3690870 in my factory parts book No 212 1951 edition and it is listed under two sections Chevrolet and Pontiacs  

1) 1949 -51 / All exc AT.  A  Main Shaft 3690870, mates with B counter shaft 590827 and C Reverse Shaft 590831 

2) 1949-51 / 20-22 exc AT A Same as above , B same as above , C same as above ,

Observation, in No 2 is the 20 / 22, is this  reflecting the model of the car ? Like mine is a model 22 -07

My listings don't show 1952-53 , sorry

Dale



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Dale Petrie

1950 Pontiac Silver Streak 2 Dr Sedan

1967 Beaumont  2 Dr Sport Coupe A 51

1985 GMC 1500 Sierra 4x4 One Owner



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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.


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