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02-11-2018, 08:41 PM
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#1 |
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Registered User
Join Date: Apr 2015
Location: Spokane, Washington
Posts: 39
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Transmission ID
This is a 3-speed automatic that I pulled out of my '72 C20. I assumed it was a TH350, but the guy at NAPA said that truck with a 350 V8 could have 8 possible transmissions. Where do I scrape to find markings? Can you ID it just by pan shape?
Thanks. https://drive.google.com/file/d/1tOC...ew?usp=sharing https://drive.google.com/file/d/1-8f...ew?usp=sharing https://drive.google.com/file/d/1CC2...ew?usp=sharing |
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02-11-2018, 08:48 PM
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#2 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Transmission ID
__________________
Stan 67 swb BLU MULE posted via flip-fone |
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02-11-2018, 08:50 PM
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#3 |
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Registered User
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
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Re: Transmission ID
turbo 350
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02-11-2018, 11:11 PM
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#4 |
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Registered User
Join Date: Apr 2015
Location: Spokane, Washington
Posts: 39
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Re: Transmission ID
Awesome, thanks!
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02-12-2018, 09:10 AM
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#5 |
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Senior Member
 
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,933
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Re: Transmission ID
Yes TH350 and I’d stand in line at NAPA at someone else’s register. There were only 2 three-speed automatic transmissions available. 350 and 400.
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02-12-2018, 10:37 AM
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#6 |
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Custom Sport W/T
Join Date: Nov 2010
Location: Tarpon Springs,Fl & Annapolis,Md. ....................Quaint drinking villages with a fishing problem
Posts: 898
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Re: Transmission ID
And if you have one as pictured with the Monster label on it you are likely in deep poo poo. Search "Monster complaints" to read the nightmares.
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02-12-2018, 11:54 AM
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#7 |
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Registered User
Join Date: Apr 2015
Location: Spokane, Washington
Posts: 39
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Re: Transmission ID
Good to know. It's original, so I think I'm ok.
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02-13-2018, 03:03 PM
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#8 |
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Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Transmission ID
not to hijack this thread but i have a 4 speed manual with a 307 . any ideas what that is because every one just calls it a 4 speed.
__________________
 ( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original )94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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02-13-2018, 03:18 PM
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#9 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Transmission ID
It's either Muncie or New process [rare]
__________________
Stan 67 swb BLU MULE posted via flip-fone |
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02-13-2018, 06:17 PM
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#10 |
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Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Transmission ID
Ok safe bet to say Munice. Nothing specal about my pickup. But is thare an esay way to tell wich one it is that doesn't involve scraping 47 years worth of greas off it. Like is the pan differnt?
__________________
( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original )94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) Last edited by 71gmcC15; 02-13-2018 at 06:23 PM. |
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02-13-2018, 06:56 PM
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#11 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Transmission ID
__________________
Stan 67 swb BLU MULE posted via flip-fone |
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02-13-2018, 09:27 PM
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#12 |
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Senior Member
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,933
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Re: Transmission ID
Here's a good thread to ID the SM465. This is different from a car trans - has a granny low/1st. http://67-72chevytrucks.com/vboard/s...d.php?t=457810
If original, it should be on the SPID - as "M20" I believe - it was not standard equipment, lack of mention on the SPID would mean the truck was born as a 3-speed. Last edited by jocko; 02-13-2018 at 09:41 PM. |
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02-13-2018, 10:20 PM
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#13 | |
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Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Transmission ID
Quote:
__________________
( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original )94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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02-13-2018, 10:32 PM
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#14 |
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Senior Member
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,933
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Re: Transmission ID
4-speed should be listed on the SPID for Chev or GMC as it was an optional trans. Here's a couple GMC SPIDs for ref. These truck are so old that something swapped in 20 years after it was new can look original at this point, ha. But you never know, SPIDs have had mistakes before!
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02-13-2018, 10:54 PM
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#15 |
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Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Transmission ID
Who knows for sure maby it was swapped in from another 67-72gm truck. That would explane all the correct parts.
__________________
( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original )94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) Last edited by 71gmcC15; 02-13-2018 at 11:00 PM. |
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