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Muncie m-21 transmisson lever orientation

 
Old 07-10-2019, 02:26 PM
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DFA
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Default Muncie m-21 transmisson lever orientation


Is this the correct orientation of the shift levers for a 66 M-21 close ratio Muncie Transmission ? I'm asking about the two levers that the shift rods connect to. The levers have a bend in them and I'm not sure if I have them placed correctly.
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Old 07-10-2019, 02:41 PM
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65GGvert
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Threads on the rod look awfully close to the end, but I think the orientation of the levers is correctl

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Old 07-10-2019, 03:19 PM
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65GGvert,
Thanks for the picture. It looks to me that my 3rd to 4th lever is reversed from yours. By that I mean mine is bent away from the tranny and yours is bent towards the tranny. This would also explain why the threads are so close to the end of the rod. Is this what you see also ?
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Old 07-10-2019, 04:15 PM
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Also looks like you have (or did have) a pretty decent oil leak..
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Old 07-10-2019, 05:05 PM
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To stir the pot (in a nice way, I hope), this subject has been a little controversial in the past. The AIM and service manuals pretty clearly show the 1-2 lever (rear) with the offset towards the transmission, and the 3-4 lever (front) with the offset towards the tunnel wall. JohnZ supported this configuration in an old post from 2010. https://www.corvetteforum.com/forums...-question.html

With that said, the 1965 St. Louis picture at body drop that has been floating around pretty clearing shows both levers with the offset towards the transmission.

I personally run mine with both offsets toward the transmission and have found no interference through the full shift pattern. My recommendation would be to do the same.

Pic from AIM's

Pic from Service Manual


Body drop pic from St. Louis 1965
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Old 07-10-2019, 06:44 PM
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I should have added the exception to actual assembly pictures was the unique '63 shifter with the crossed shift rods. The 3-4 lever was clearly assembled with the offset outward toward the tunnel wall.

AIM pic


Pic of '63 Fuelie from JohnZ presentation

Last edited by Mike67nv; 07-10-2019 at 07:05 PM.
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Old 07-10-2019, 07:30 PM
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Originally Posted by DFA View Post
65GGvert,
Thanks for the picture. It looks to me that my 3rd to 4th lever is reversed from yours. By that I mean mine is bent away from the tranny and yours is bent towards the tranny. This would also explain why the threads are so close to the end of the rod. Is this what you see also ?
Thanks,
DFA
That's not mine, but I thought they looked exactly the same as yours the front one bent away from the tranny and the rear one bent toward it. The important part is to keep the rods from scraping together
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Old 07-10-2019, 07:42 PM
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My experience has been that when in neutral both 1/2 and 3/4 levers are almost vertical.
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Old 07-10-2019, 08:29 PM
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Originally Posted by 65GGvert View Post
My experience has been that when in neutral both 1/2 and 3/4 levers are almost vertical.
On a '67 at least, the levers actually slant slightly toward the rear when both are in neutral. If the 3-4 lever were reversed (offset outward), it would slant slightly forward and require a longer adjustment on the rod like the OP was showing in his first post.

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Old 07-10-2019, 09:47 PM
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Originally Posted by Frankie the Fink View Post
Also looks like you have (or did have) a pretty decent oil leak..
Yep, rear seal on the intake manifold was leaking. Fixed that last summer.
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Old 07-11-2019, 08:49 AM
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Originally Posted by Mike67nv View Post
On a '67 at least, the levers actually slant slightly toward the rear when both are in neutral. If the 3-4 lever were reversed (offset outward), it would slant slightly forward and require a longer adjustment on the rod like the OP was showing in his first post.


Mike,
Is it OK if I save this picture to my file?
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Old 07-11-2019, 10:20 AM
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I installed my 3-4 rod as shown in this picture and the rod end hit the tunnel at the shifter. Had to turn it around and place the adjustment at the Tran end.
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Old 07-11-2019, 10:24 AM
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Here's another picture I have on file from a previous thread, not sure who's picture, but it shows a pretty clear view:

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Old 07-11-2019, 10:59 AM
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Originally Posted by DZAUTO View Post
Mike,
Is it OK if I save this picture to my file?
Absolutely.
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