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                              Refresh your page F5  Last Updated: Sept 06, 2013  (added OEM Shifter on Muncie Trans)

 

 

My Muncie M22 sounds I recorded with 4.10 gears. www.nastyz28.com/=copo/m22sounds.zip    

 

 

Side view id.

 

 

Muncie (left)                    Saginaw (center)                 Borg Warner (right)

 

 

 

 

 

              

 

 

 

Mine shown here with an aftermarket  Hurst Comp Plus. I have since changed it back to the original Hurst.

To see the OEM shifter lever clips and wave washers go to http://www.nastyz28.com/~copo/shifter_area.htm

 

 

 

 

1970 OEM Hurst Comp Plus Shifter

 

 

1970 Shifter Mount Plate

 

 

 

 

 

 

Case

 

 

WB code for a M20. I kept the code on and painted the tranny

 

 

 

Gears

 

 

RPO M20/M21 gear set

 

 

 

RPO M22 gear set

 

 

Here is mine. I've already removed the mainshaft out but forgot to snap a pic and inserted it again, so

that's why 3rd gear looks lop sided. I needed to replace some worn parts and disassembled it.

Note the thickness of the 3-4 slider where the shift fork rides.

 

M22, here I've replaced my sliders with the new torque thrust sliders.

If you have worn gear engagement teeth (the part that locks into the slider), these sliders will stop the tranny from popping out of gear.

But it's best to replace both the worn gear, slider, 3 slider keys and the lock ring since the tranny is already open. The hub can be reused.

 

 

 

4th gear comparison

 

 

 

 

 

M22 10 spline with bearing retainer installed with french locks on the bolt heads

 

 

 

M20 10 spline

 

 

M22 counter gear

If your replacing your needle bearings in the counter gear, I like to use a cut off broom stick so

I can lay it back in the case without any bearings dropping. Then I can slide the counter gear

shaft into the case and counter gear. While you slide the steel shaft in, it will push out the broomstick. 

 

 

     

M22/M20,M21 counter gear

 

 

 

M20 26 spline

 

 

 

10 spline input shaft and counter gear

 

 

 

26 spline input shaft and counter gear

 

 

 

 

 

 

M20 Gears 1-2-3-4

 

 

 

 

 

 

                        

  

 

 

 

M21

 

 

 

 

M22 Gears 1-2-3-4

 

 

 

 

1st gear/sleeve

 

2nd, 3rd & 4th gears

 

 

 

 

M22 gears (missing 3rd gear)  

 

 

 

Plastic speedo gear

 

 

 

 

Part No. Tags

 

 

Muncie part no tag

 

 

 

Muncie repro part no tag

 

 

 

 

TCS

 

 

 

 

 

 

 

 

 

 

 

Bronze Input Shaft bushing

 

 

 

 

 

Speedo cable adapter 

 

 

        

From my 71 Z28. My 70 Z28 is the same except it's has P5 rather than P7. See pic below.

Part # 3950352 (it has Stewart Warner and ratio .8241 stamped on it).

Used on 1970-75 all ST (standard transmissions)

 

  new GM oil seal part # 10054241 as of Sept 2012

From my 70 Z28

19 tooth speedo gear

 

 

 

 

Speedo cable route

 

 

 

 

 

 

 

1970 Cross member

 

 

 

Shift forks on side cover

 

 

 

Worn and New Gears and Sliders

 

Worn M22 engagement teeth. The gear itself would take a lot of punishment to break.

Too bad the engagement teeth wear from slamming into the slider.

 

Gear

 

Worn M22 engagement teeth. The gear itself would take a lot of punishment to break.

Too bad the engagement teeth wear from slamming into the slider.

 

M22 new - look at the diamond engagement teeth

 

 

Slider

 

Worn

 

New