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Old 05-05-2011, 08:18 AM
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M22 missing third gear.

Looking for info on rebuilding a M22 rock-crusher. I am the second owner of a 68 Camaro project. Supposedly, the transmission had been rebuilt by previous, and it looks like it was, but when I put the car on the road I discovered I had no third gear. I Removed the Transmission and re aligned all the linkage on the bench. Appeared to work Ok on the bench but reinstalled in the car and 3rd gear still not there. I opened it up and all appears to be in order. I moved the shift collars back and forth OK and engaged the gears. Any suggestions? Any diagrams, pictures, layouts, parts lists etc, would be appreciated.
thanks

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Old 05-05-2011, 09:24 AM
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What exactly do you mean by 'no 3rd gear'?
Does it shift hard?
Is there gear clash?
It just won't go into 3rd?
It goes into 3rd position and doesn't engage at all?

I just had a customer call us with a similar problem. He was using RedLine oil. We asked him to switch to a 90wt GL5/MT1 mineral oil (Valvoline in the WHITE bottle is easiest to find) and it worked better, another flush and fill with the same product and the transmission started to come back. PS you only need 1 quart.

Just a thought.
Here's your Muncie diagram courtesy of Auto Gear
http:/***************************

Last edited by Crosley; 05-05-2011 at 06:30 PM. Reason: Violation of guidelines. Please see: general board guidelines.
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Old 05-05-2011, 09:40 AM
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The stick goes into third position but it acts;like it is in neutral. If I push a bit harder, I get a gear grind. When I had it on the bench and shifting through the gears, it felt like it went into gear and turning the front shaft also turned the tail shaft so it certainly looked like it was in gear.
Not sure what kind of oil was used but it looks and feels like 90 wt.
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Old 05-05-2011, 10:14 AM
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Took a look at the diagram. Part A18-1 (clutch for 3rd/4th gear) appears to be reversed from what I have inside my transmission. The diagram you sent shows the smaller diameter of the part towards the rear of the transmission. Other photos I have seen of the assembled shaft show the smaller diameter of part A18-1 towards the front of the transmission,(which looks like mine).
What is correct?
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Old 05-05-2011, 10:50 AM
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your sliding clutch is reversed. You must of had an awful time putting the side cover on. It needs to be disassembled, reversed and replaced. If you don't feel comfortable doing it yourself, contact me through PMs and we'll see if we can find a local builder for you.

SA Motorbooks "How to Rebuild and Modify High Performance Manual Transmissions" by Paul Cangialosi is a very good read for this and very informative.

You can also post here or call me directly if you have any questions.
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Old 05-05-2011, 02:11 PM
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I have not tried putting the cover back on so don't know if the previous guy had a cussing fit or not.
It is interesting to note that there are other sites on the net that show the sliding clutch mounted with the smaller diameter forward. I guess that is what the previous owner must have used to build it. I also talked to a friend of mine who is an old timer in the transmission business. He also made the comment that the "shift collar" was probably backwards....a common mistake among builders.
I can handle the rebuild myself. I just needed the correct document.
Sure is nice to have a forum where a guy can get the right answers.
Thanks much for your help.
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Old 05-05-2011, 03:09 PM
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fork groove to the inside my friend.
glad we got it figured out.
Good Luck!
Nate
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Old 05-05-2011, 03:42 PM
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OK, now I am confused.
My transmission does have the fork groove on the inside for the 3/4 gear which puts the smaller diameter of the sliding clutch on the outside.
The diagram you sent looks like it is on the outside.
If the fork groove is supposed to be towards the inside, my unit is built correctly. Now what else could be the problem?
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Old 05-05-2011, 04:28 PM
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With the side cover off, slide the shift collar towards the rear of the trans, does it engage both the synchro ring and third gear teeth? If it does, take the 1,2 shift fork out of the cover, put 3,4 shift fork in 3rd gear position, cover should set right on , easily w/o any difficulty. Verify trans is in 3rd{ hold input.try to turn output} if that works , then what condition are driven [small] 3rd gear teeth in ? good pics would help diagnose. dave
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Old 05-05-2011, 06:31 PM
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Autogear,

the PDF file was removed again because of the business contact information in the file
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Old 05-06-2011, 07:08 AM
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no problem;

Ive got to figure out how to edit a pdf and take that off for you guys. I don't have raw text or a paper copy anymore.
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Old 05-06-2011, 07:25 AM
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Didn't get a chance to look at it last night so will take another look this weekend. I'll keep you posted as to what I find.
Thanks for the tips.
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Old 05-09-2011, 07:40 AM
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Had a look over the weekend. Everything looks good and functions well on the bench. The sliding clutch goes in and out of third fine. Front shaft and rear shaft lock up fine when shifting into 3rd gear. No chipped teeth or bashed gears/rings anywhere that I can see. All looks new. Side Cover dropped right on when I put the fork in 3rd position. Any other ideas and welcome.
Maybe try to put it back in and give it another try.
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