| |
Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
====
| | |
1 members (Shade Baby),
21
guests, and
4
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,009 Posts1,055,293 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | 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
| | |
|
|
| |
