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post #1 of 7 (permalink) Old 12-02-2011, 08:58 PM Thread Starter
 
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Trans # help

These are the # on the 4 speed trans I have,Can someone tell me what trans this is ?
case#3885010
this # was hard to see but it looked like 6k115304
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post #2 of 7 (permalink) Old 12-03-2011, 11:33 PM
 
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these nos. have no meaning for identification.
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post #3 of 7 (permalink) Old 12-04-2011, 01:59 PM
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3885010 is the casting number for a 1965-1967 Muncie, 2 input rings would be a M-20, 1 input ring would be a M-21.

M-20 Ratio= 1st-2.52, 2nd-1.88, 3rd-1.46, 4th-1.00 and rev.-3.11
M-21 Ratio= 1st-2.20, 2nd-1.64, 3rd-1.28, 4th-1.00 and rev.-2.27

6k115304- 6=1966, K is for the assemble plant whick may be Kansas, 115304 is the build sequence of the car and may also be part of the car's vin number.

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post #4 of 7 (permalink) Old 12-04-2011, 02:55 PM Thread Starter
 
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??

So this would be a correct 4 speed for a 67 gto ?
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post #5 of 7 (permalink) Old 12-04-2011, 03:49 PM
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Originally Posted by mikey gto View Post
So this would be a correct 4 speed for a 67 gto ?
Depends on the date code, in 66 the date code would be "P0106" P=Muncie Plant 01=January and 06 would be the 6th day.

In 67 the coding changed to P7A06 P=Muncie Plant, 7=1967 A=January and 06 would be the 6th day.

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post #6 of 7 (permalink) Old 12-05-2011, 05:37 PM Thread Starter
 
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So where would i find the correct # on the trans other then the 2 I listed ? I am going to sell this trans and I dont want to tell someone it's a 67 and it's not.
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post #7 of 7 (permalink) Old 12-05-2011, 06:06 PM
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Here is a website with Muncie information, there should be several casting numbers and date codes on the transmission to help you determine the correct year, good luck,

http://members.tripod.com/camaro_obsession/muncie.htm

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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Projects, Barn Finds & Restoration Discussions

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