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05-30-2023, 06:49 AM
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#1 |
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Registered User
Join Date: Oct 2014
Location: HONOLULU
Posts: 3
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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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05-30-2023, 07:54 AM
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#2 |
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Senior Member
 
Join Date: Dec 2009
Location: TN.
Posts: 8,415
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Re: Transmission Identification
My Sm420 the shift pattern is reverse is to the driver's side and down.
Here's a link to some info. Link: http://www.offroaders.com/tech/jeep/...D-gm-sm420.htm
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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05-30-2023, 07:22 PM
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#3 |
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Registered User
Join Date: Oct 2014
Location: HONOLULU
Posts: 3
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Re: Transmission Identification
Thanks for the info! My reverse is in the same location as well. The photos on that page look pretty close, numbers are off again though.
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05-30-2023, 09:53 PM
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#4 |
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Senior Member
Join Date: Dec 2009
Location: TN.
Posts: 8,415
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Re: Transmission Identification
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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