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Discussion Starter #1
While I had my Muncie out for some Clutch work, I decided to replace the gaskets in my tranny and basically just take a good look in there to make sure that everything is all right. When I took the front bearing retainer off, I noticed that the bearing did not fit tight in the case at all. I can rotate the bearing (the outer race, not the inner) freely and I think that it has been rotating during operation. Should the bearing fit like this? Does the bearing retainer hold everything in place, or is my case just shot?
 

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The bearing retainer holds it in place,
Try pushing the race up and down, left to right, if you can see movement, and a gap between to outer race and the case then yes it sounds like the bearing rotated and the case is toast.
 

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Discussion Starter #3
Yes, I can get side to side movement. I figured the case was gone. I don't suppose that there is anything that can be done to correct this?
 

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Yes replace it.
http://www.gearzone.net/case.html

The case is the weak part of the muncie series trans. By using a super case and a cast iron mid plate you can prevenent premature failure of your good tranny.

Just for information purposes you can get a new super case, a NEW set of M-20 gears cut on the M-22 angle and an iron mid plate for about $900.00 That and your "parts" m-20 and a gasket set you can have a bullet prof ( well almost ) set up . $900 seem like a bunck of money? What would it cost to build up a rear or slap on a set of aluminum heads?

If you can build a motor you can build a muncie with only one special tool, a thin wrench for the front retaining nut.
 

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Or, it you want to rebuild I have a M-20 case leftover from when I had an Autogear M-22 built.

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Rick Dorion
69 RS Conv,355,Autogear M22,4.10's and I don't worry about stone chips ( yet ).
 

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Discussion Starter #6
Rick, you have mail.

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69 Camaro
400 Small Block
Trick Flow Heads
Comp 282S solid cam
Performer RPM intake
750 CFM Holley
and a Muncie four speed
Pics of My Car
 

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Discussion Starter #7
I just picked up a new used case. The difference is amazing. The front bearing fits like it should now.

It looks like someone dipped my old case in acid or went crazy with a sand blaster because it looks like the hole that the front bearing fits in was eaten away, not worn away. This thing should finally be right now.

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69 Camaro
400 Small Block
Trick Flow Heads
Comp 282S solid cam
Performer RPM intake
750 CFM Holley
and a Muncie four speed
Pics of My Car
 
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