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Author Topic:   Saginaw or Muncie 3 speed
posted November 25, 2002 09:13 PM
A guy give me a couple of used 3 speed transmissions and I don't know what they are out of. I thought they were Saginiw's but when we went to the GM parts book the muncie tranny looked the same. I need to a few parts for one of them and need to know what tranny I have. It has a casting # 3925847. Hope someone can help.

posted November 26, 2002 09:44 AM
I assume the Muncie is the better of the two? Is that correct?

posted November 26, 2002 06:09 PM
Here is another way to tell if it's a saginaw or muncie

type = m)uncie, s)aginaw

type years side cover id case id case length application
m318/319 '55-68 4 cast iron 7-1/8" --

m330 '69-78 7 cast iron 11" fully sync'ed

s326 '66-+ 7 cast iron 9-5/8" fully sync'ed

Saginaw 3 speed, grooves cut into the splines of the input shaft:
grooves run perpendicular to splines, all the way around the shaft.

0 Line 2.85-1st, 1.68-2nd, 1.00-3rd
1 Line 2.54-1st, 1.50-2nd, 1.00-3rd
2 Line 3.11-1st, 1.84-2nd, 1.00-3rd
3 Line 3.50-1st, 1.89-2nd, 1.00-3rd

posted November 28, 2002 09:24 AM
Thanks for the info. I am sure it is a saginaw.

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