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Old 09-25-2004, 06:41 PM
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Unhappy muncie tranny identification

hi
i own a 67 camaro which was originally a 6 cylinder car. now it has a 327 with a muncie 4speed. i found a bunch of numbers on housing but still cant determine if it is a rock crusher.when i bought the car i was told it was, but would like to find out for sure. it really seems to have a loud whine in low and second.

the numbers on the housing are
as follows

3950306
946797
us patentno.3088336
3857584
3925660
p9b12a

thanks in advance

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Old 09-25-2004, 09:00 PM
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3925660, this number indicates it's a case that is used on a 68 or 69 transmission


p9b12a this number in conjunction with the above casting number make the trans a 69 m20

P = muncie
9 = 1969
b= febuary
12 date

and last the a is for a m20


A= m20
B= m21
C= m22

Now the problem come in is if someone changed all the internal parts from a m22 into this case.

Look at the input and see how many rings are around it.

1= m21
2 = m20
none = m22

I am betting it has 2 rings.

Keith
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