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Author Topic:   3 speed
Dirt Newbie

Total posts: 2
posted June 02, 2005 08:48 PM  
looking for help on this gm trans casting number #41 3952645. I am trying to find what 2nd gear it has

Dirt Freak

Total posts: 255
posted June 03, 2005 05:07 AM  
Look at the shaft that goes into the engine.
There should be grooves going across the splines. tell us how many.
Anywhere from 0 to 3 grooves.
We would also have to know if this is a Muncie or Saginaw, somebody on here should be able to explain how to tell the difference.

second gear
0 line 1.35
1 line 1.50
2 line 1.84
3 line 1.89

0 line 1.75
1 line 1.57

Dirt Newbie

Total posts: 2
posted June 04, 2005 06:24 PM  
Thanks!!! Helped a lot.

Dirt Full Roller

Total posts: 26
posted June 11, 2005 12:10 PM  
That dose not always work my saginaw has 3 groves but it has a 1.68 2nd geer.

tin cup
Dirt Full Roller

Total posts: 40
posted June 11, 2005 01:18 PM  
Yep, line's don't alway's work. Try this. Turn the tail shaft 10 time's and count the number of turn's of the front shaft. If you turn it 10 time's and the front sheft turn's 15 time's, it is a 1.5 second gear. Just an example. Also make sure you write it down on the tranny. I would do it for 1st and 2nd gear's. Third will be a 1:1.


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