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Old 05-30-2023, 06:49 AM   #1
nateclowar
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Join Date: Oct 2014
Location: HONOLULU
Posts: 3
Transmission Identification
I have a 1966 C10 Long bed, originally a 292 and 4-speed with granny gear. I believe I have a Muncie SM420, some of the numbers match images I've seen, but I can't find a letter on the case that matches the ID documentation I read here: http://67-72chevytrucks.com/vboard/s...d.php?t=327764

Above the PTO mine has:
1225
8
GM
3837334

At the rear
591701
GM 2
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