Help identifying my transmission... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1971c10longbed · 11-25-2023, 03:27 PM

Stock transmission, 3 on the tree... can anyone tell me if it's a Muncie or a Saginaw?

roboticjunky · 11-25-2023, 04:22 PM

Base on this old thread.
https://67-72chevytrucks.com/vboard/...=216510&page=2

It's probably a Muncie.

Member "Shifty" on post #31 has some of the same numbers. Post #41 shows where to find the model number. Post #56, "Shifty" finds has has a 1971 Muncie 3 speed M20.

**kwmech** · 11-25-2023, 07:42 PM

The muncie reverse lever is in the extention housing, and the cover has 7 bolts. The Saginaw reverse shift lever is on the cover, and the cover has 7 bolts. The Borg Warner has a 9 bolt cover.

**Rust_never_sleeps** · 11-25-2023, 10:35 PM

https://static.summitracing.com/glob...%203733163.pdf

It's no help matching casting numbers, but by appearance, you should be able to figger it out. Hope this helps

geezer#99 · 11-26-2023, 12:53 AM

Check this chart.
The side cover bolt pattern will help.

https://lugnutz65chevystepside.weebl...ission-id.html

**1970cstblazer** · 11-26-2023, 08:33 AM

Muncie:

1971c10longbed · 11-26-2023, 11:03 AM

Thanks to all that replied... going to crawl under the "money pit" and see what matches up.

11-25-2023, 03:27 PM	#1
1971c10longbed Registered User Join Date: May 2016 Location: northern CA Posts: 14	Help identifying my transmission... Stock transmission, 3 on the tree... can anyone tell me if it's a Muncie or a Saginaw? Attached Images

11-25-2023, 04:22 PM	#2
roboticjunky Registered User Join Date: Oct 2015 Location: IN Posts: 209	Re: Help identifying my transmission... Base on this old thread. https://67-72chevytrucks.com/vboard/...=216510&page=2 It's probably a Muncie. Member "Shifty" on post #31 has some of the same numbers. Post #41 shows where to find the model number. Post #56, "Shifty" finds has has a 1971 Muncie 3 speed M20.

11-26-2023, 08:33 AM	#6
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,392	Re: Help identifying my transmission... Muncie: __________________ 1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels

11-26-2023, 11:03 AM	#7
1971c10longbed Registered User Join Date: May 2016 Location: northern CA Posts: 14	Re: Help identifying my transmission... Thanks to all that replied... going to crawl under the "money pit" and see what matches up.

11-25-2023, 07:42 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,449	Re: Help identifying my transmission... The muncie reverse lever is in the extention housing, and the cover has 7 bolts. The Saginaw reverse shift lever is on the cover, and the cover has 7 bolts. The Borg Warner has a 9 bolt cover.

11-25-2023, 10:35 PM	#4
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 451	Re: Help identifying my transmission... https://static.summitracing.com/glob...%203733163.pdf It's no help matching casting numbers, but by appearance, you should be able to figger it out. Hope this helps

11-26-2023, 12:53 AM	#5
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,532	Re: Help identifying my transmission... Check this chart. The side cover bolt pattern will help. https://lugnutz65chevystepside.weebl...ission-id.html



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