M-22 pops out of 2nd and 3rd - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-27-2011, 07:11 PM
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M-22 pops out of 2nd and 3rd

I have a 67 Camaro I bought about 3 months ago. I am trying to get a good driver. has 350 crate motor the transmission is a 4 speed M22. I have paper work that says it was rebuilt in 91??? for what that's worth. it is very loud in 1st,2nd and 3rd.I know they call it the ROCK CRUSHER but its ""very loud"" anyway what is my problem is it pops out of 2nd and 3rd on deceleration.it is fine in 1st and 4th I checked the fluid and topped it off! Is it time to rebuild again?

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Old 11-28-2011, 12:12 PM
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Stuck away from my desk; as soon as I can, I'll give you list of things to check
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Old 11-28-2011, 01:06 PM
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Synchro's, slider's most likely gears also, you could be lucky & have a mal-adjusted shifter, but I doubt it , sorry...

dave
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Old 11-28-2011, 03:03 PM
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Worn out sliding clutches or engagement teeth or both if its not badly adj. shift rods. Its time to tear it down and look at things. You'll probably need new a new reverse on the mainshaft, a reverse idler and a rebuild kit. You might have some thrashed shift forks as well.
If you want some prices, contact me directly via PM.

By the way, theres a lot of muddled info regarding lubricants. a GL4 non synthetic is best; and truly, honestly.... no more than 1 US quart. Any more than that just makes the box run hot.
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Old 11-29-2011, 10:31 AM
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Another thought from my boss this time; check the side cover as well. The bores for the shifter shafts could be worn, which beats up the 'scissor' arrangement on the backside of the cover. This can also chew up the 'stud' part of the shift fork and create misalignment. When all this goes south, you unknowingly try to adjust out the misalignment through the shifter linkage, which only exacerbates the problem.

Is there any leaking through the sidecover or countershaft bore?
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Old 11-29-2011, 09:11 PM
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Thank you for your help No leaking any where.maybie a little from the front and back seals but " a little" sounds like time for a pro to rebuild
again thank you for all your help
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Old 11-30-2011, 06:46 AM
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No problem. Keep us posted.
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Old 11-30-2011, 05:17 PM
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If it was a Ford

If this was a Ford standard shaft the 1st place I would look is the input shaft bearings, then else where stripped gears etc
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