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Old 02-18-2012, 11:04 PM   #1
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Default Muncie

What is the usual cause for a Muncie to jump out of third gear upon decelleration?
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Old 02-19-2012, 10:08 AM   #2
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Worn out. Seriously I used to have a list that had 20 different causes. #1 shifter loose---Trevor
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Old 02-19-2012, 07:33 PM   #3
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Actually it was just rebuilt. It was good for about 50 miles and then this started. I guess that is what I get for having someone else rebuild it for me. Sucks when I have to work out of town.
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Old 02-20-2012, 10:58 AM   #4
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Out of alignment, pilot bushing. Did you install it---Trevor
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Old 02-20-2012, 01:53 PM   #5
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Did he replace all the syncros?
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Old 02-20-2012, 06:56 PM   #6
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I did pull the side cover when I recieved it to see if I got more than a "parts washer rebuild". Everything looked brand new. I had him use the AGM Super Case and an iron mid plate. I even sprang for the roller bearing side cover with lip seals.
I checked and adjusted the bell housing alignment with a checking tool because I also installed a scatter shield. On the plus side. it was not a customer's trans. This crap only happens to my stuff.
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Old 02-21-2012, 11:14 AM   #7
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Default Re: Muncie

Quote:
Originally Posted by twomanynovas View Post
What is the usual cause for a Muncie to jump out of third gear upon decelleration?
Check the engaging teeth on 3rd gear and the shift sleeve/ slider...I use the torque lock shift sleeve/ slider that is available to prevent this.. Also the engaging teeth on 3rd gear must be sharp and not rounded off...
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Old 02-21-2012, 06:24 PM   #8
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Thanks LFD. Do you sell parts?
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Old 02-21-2012, 07:21 PM   #9
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Yes i do...
I PMd you....
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Old 02-21-2012, 07:52 PM   #10
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Default Re: Muncie

More than likely the sleeve and gear are tapered allowing it to jump out of gear.
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Old 02-21-2012, 09:37 PM   #11
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If it has a different side cover and case it may not be engaging all the way. You may be able to just grind the detent lever---Trevor
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Old 02-22-2012, 12:14 AM   #12
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If you have an extra case laying around, you can cut a large hole in the top and make a mockup case out of it. Really helps to see what the effects are when playing with the detents. You can also play with the shape of the detent's profile to hold the trans in a certain gear more firmly. I used to do it to circle track transmissions to keep them from jumping out of gear on rough tracks.
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