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Transmission & Driveline Transmissions and Differentials

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  #1  
Old Mar 24th, 06, 06:56 AM
Jamie Shytle Jamie Shytle is offline
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Jamie
 
Join Date: Dec 2005
Location: Blacksburg, SC
Posts: 32
Wink 3925660 Muncie

I just purchased a Muncie that is supposed to be an M-21.
The numbers are as follows:
3925660
Also: P9T0A
The tail piece has 3884085 casted into it.
The front shaft has the single groove with thick splines.
Can anyone identify"
Thanks
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  #2  
Old Mar 24th, 06, 08:56 AM
1962vette 1962vette is offline
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Paul
 
Join Date: Jan 2006
Location: Pearl,Ms
Posts: 403
Default Re: 3925660 Muncie

Trans was originally an M-20 as verified by P9ToA THe last letter, A =M-20 , B=M-21, C= M-22.That being said ,the single ring on the input shaft is the identifier for an M-21, two rings M-21, no rings M-22 or replacement input that had no identifier rings.

This trans appears to have been rebuilt at one time using close box parts.
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  #3  
Old Mar 24th, 06, 08:56 AM
JodysTransmissions JodysTransmissions is online now
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Default Re: 3925660 Muncie

Quote:
Originally Posted by Jamie Shytle
ShyThe front shaft has the single groove with thick splines.
Can anyone identify"
Thanks
1 ring = M21
2 rings = M20
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  #4  
Old Mar 24th, 06, 09:09 AM
Jamie Shytle Jamie Shytle is offline
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Jamie
 
Join Date: Dec 2005
Location: Blacksburg, SC
Posts: 32
Talking Re: 3925660 Muncie

Thanks for the info
I knew it was just rebuilt. Will the Hurst comp+ shifter and linkage work with the M-20 case. I hope there isn't any difference. This whole thing is turning into a lot more than planned.
But, I'm not grumbling!!!!!! ain't nothing like shaking hands with 500+hp
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  #5  
Old Mar 24th, 06, 10:34 AM
1962vette 1962vette is offline
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Paul
 
Join Date: Jan 2006
Location: Pearl,Ms
Posts: 403
Default Re: 3925660 Muncie

No difference in Hurst shifter. Just be sure you have the correct shifter as far as the style shifter arms that are to be bolted to transmission. Early trans (63-67)have a stud with attaching nuts and later trans (68-up use a bolt to hold arms on.These arms are not interchangable
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  #6  
Old Mar 24th, 06, 04:29 PM
crashent crashent is offline
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Join Date: Dec 2001
Location: Kenosha, WI.
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Default Re: 3925660 Muncie

1968 Model year and older use studs to attach shift levers...
1969 Model year and newer use bolts to attach shift levers...
Hope this helps... Crash
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