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Old 03-28-2006, 07:15 AM   #1
al's71gmc
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Identify this trans?? please

This is a 4spd in a 72 gmc 1/2. I think the option code says sm20, but I'll check it tomorrow if no one has id'ed it before then. Thanks, Al
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Old 03-28-2006, 07:21 AM   #2
al's71gmc
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Re: Identify this trans?? please

I thought I uploaded the pic. I'll try again...oops, I see the prob, didn't shrink it enuf the 1st time.
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Old 03-28-2006, 07:23 AM   #3
Bishops Trucks
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Re: Identify this trans?? please

I believe it would be a Muncie. Looks like the one in my '70 but mine says sm465.
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Old 03-28-2006, 01:55 PM   #4
sneakysnake
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Re: Identify this trans?? please

here are a few
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Old 03-28-2006, 07:15 PM   #5
72armyswbtruck
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Re: Identify this trans?? please

Wow now that's a pic that I am going to have to save.
BTW love your handle
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Old 03-28-2006, 09:50 PM   #6
JAKES 68GMC
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Re: Identify this trans?? please

Looks like an SM465.
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Old 03-28-2006, 10:16 PM   #7
kwmech
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Re: Identify this trans?? please

Quote:
Originally Posted by JAKES 68GMC
Looks like an SM465.
I'll agree with that--does it have 2 pto covers?
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Old 03-28-2006, 11:37 PM   #8
al's71gmc
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Re: Identify this trans?? please

Great pic sneakysnake! Thanks. Looks like the 465 to me too. I just wasn't sure cause the option code is M20, so I was thinking 420. I'll check the pto covers. If it has 2, then it's def a 465?? Thanks all.
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1971 GMC 2500 4x4
1972 GMC Sierra Grande 1/2 t 4x4-#1 son's truck. Recently completed resto.


4 YO daughter," Daddy, I like your truck better than Mom's." (2000 F350-ranch truck) Smart kid!!
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Old 03-29-2006, 09:36 PM   #9
1969K10
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Re: Identify this trans?? please

If reverse is right and down, SM 465, if reverse is left and down, SM 420, IIRC
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