1970 Muncie 4 speed??? - Team Camaro Tech
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post #1 of 8 (permalink) Old Aug 14th, 09, 07:23 AM Thread Starter
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1970 Muncie 4 speed???

Trying to determine what I need to change to install a 1970 Muncie transmission (P0A05A) with extension housing casting number 3978764 in a 1969 Camaro. The '69 needs a 3857584 extension housing for the correct shifter??? Is this a '70 transmission that had a different extension and mainshaft installed? The mainshaft has the fine splines.
Thanks
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post #2 of 8 (permalink) Old Aug 14th, 09, 02:30 PM
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Re: 1970 Muncie 4 speed???

I may be off here, but I don't recall our Muncies having different tail-housings?? What side is the speedo end on?

In and out spline counts are course for the early years and fine for the later years here is all.

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post #3 of 8 (permalink) Old Aug 14th, 09, 04:08 PM
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Re: 1970 Muncie 4 speed???

I'm not a part number guy, but...
There were a few different muncie tailhousings. firstgens came with a short - pass side speedo.
Most everything else came with a short - drivers side speedo.
Some big cars came with a long tailshaft.

As long as it's a short tailshaft, it will fit.
drivers side speedo is actaully easier, just use a speedo cable for that year camaro with a powerglide or t350.

powerglide or t350 crossmember and drivershaft will fit.

yoke could be different, fine spline muncie's might have a different spline output shaft too (someone will know and post up)

fine spline clutch is not a problem, just get one it will fit.

The right hurst aftermarket shifter will bolt on to the short tailshaft.

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post #4 of 8 (permalink) Old Aug 14th, 09, 07:40 PM
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Re: 1970 Muncie 4 speed???

This is my 70 Z28 M21 Muncie, it has various Bosses in the tail extension to mount the Hurst shifter using a base plate mounting bracket original to the 70.




Note the Mounting Bosses on the tail housing to locate the Shifter's mounting Plate.
I know th PIC run out there but I believe you can see most oft it. You should be able to mount this tranny in the 69 and locate the shifter where you want it.

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This was my 70 1/2 Z28
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Last edited by Z15CAM; Aug 14th, 09 at 07:52 PM.
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post #5 of 8 (permalink) Old Aug 14th, 09, 08:34 PM
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Re: 1970 Muncie 4 speed???

Great picture! Love it!

Chris
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post #6 of 8 (permalink) Old Aug 15th, 09, 07:42 AM
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Re: 1970 Muncie 4 speed???

Isn't the 764 tailhousing for the fine 32 spline 70+ trans? It will still fit, but you'll need a different clutch and driveshaft with a 400 yoke.
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post #7 of 8 (permalink) Old Aug 15th, 09, 05:42 PM
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Re: 1970 Muncie 4 speed???

Correct the Yoke and Drive Shaft length will have to be changed but the Mounting and Shifter Rod length will remain the same.

Z15CAM - There was a Viper in my Rear View
This was my 70 1/2 Z28
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post #8 of 8 (permalink) Old Aug 15th, 09, 06:43 PM
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Re: 1970 Muncie 4 speed???

The 764 tail extension shifter mount bracket bolt pattern is different than the 584 tail extension shifter mount bolt pattern.

Crashent a member here manufactures a conversion shifter mounting bracket to use a 764 tail extension in a '69 Camaro.

Jody Haag
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