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| | | | Joined: Jan 2001 Posts: 45 Member | | Member Joined: Jan 2001 Posts: 45 | I just pulled my transmission for a rebuild.
4 speed 1952 Chev half ton
the number cast on the case is 3761980
the number casted on the case cover is 591568
this number dont match the 48-54 sm420 transmission
Can anyone tell me what this transmission is by the 2 casting numbers ??
My master parts book goes to 1955 and this
number is not listed
thanks in advance if someone can help identify ??
Mike | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | I don't have casting numbers but might have information based on the treansmission ID. It is located on the rear of the case just below the cover on the left side (4-speed).
Just to be sure - do you have a closed driveshaft (torque-tube on '54 or earlier) or open driveshaft ('55 and later).
Tim | | | | | Joined: Jan 2001 Posts: 45 Member | | Member Joined: Jan 2001 Posts: 45 | It has been changed to an open driveline
It looks like t1626 but it is hand stamped
and very lightly can not read well.
the casting number on the case is 3761930
not 80 my error.
Mike | | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | If reverse is to the left and down, it should be a sm420. To the right is a sm465
Fred
52 3600
69 C-10
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