Jeep transmission jumping out of 2nd gear - JeepForum.com

 
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post #1 of 10 Old 05-01-2010, 07:42 AM Thread Starter
Tigerpaw
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1983 CJ8 
 
Join Date: Nov 2009
Location: Louisiana
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Jeep transmission jumping out of 2nd gear

I have a late model 70's cj7-- 3-speed jumping out of second gear but if the shift is held it will stay in gear. All bolts are tight on everything. What needs to be done and any idea on cost. Everything else shifts fine.

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post #2 of 10 Old 05-01-2010, 08:06 AM
AlbuqHenry86cj7
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Location: Albuquerque, NM
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My guess it trans is tired. needs rebuild which would be all new bearings and a new 2nd gear. The BW t90 is famous for this... not sure what trans you have but on the t-90 the kit was about $150..

Parts for the T90 Transmission
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post #3 of 10 Old 05-01-2010, 09:27 AM
Eaallred
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2002 WJ 
 
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Location: West Valley City, UT
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My T90 was doing this as well. Fresh rebuild too. Normally caused by the integral bushing in 2nd gear wearing out, but mine was brand new and still popped out on a downshift.

I ended up putting the shift tower in my vice and putting a large crecent wrench on the shift fork and 'tweaking' it little by little to push it into second gear further and now it works flawlessly. Just do a little at a time until it works right. It doesn't take a lot of bending, just a tweak is all.
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post #4 of 10 Old 05-01-2010, 09:28 AM
curbcrawler
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1946 CJ2A 
 
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Im guessing a wore syncro.

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post #5 of 10 Old 05-01-2010, 09:33 AM Thread Starter
Tigerpaw
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1983 CJ8 
 
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Location: Louisiana
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Found the tranny number its a T150 married to a Dana 20. No shifter binding pulled the plates and still jumps out.
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post #6 of 10 Old 05-01-2010, 09:33 AM
79cj7stone
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1979 CJ7 
 
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Location: bartlett,tn
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Haha mines does this too but only if you get on it a little. So it has become a habit just to hold it in there. Haha
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post #7 of 10 Old 05-01-2010, 07:28 PM
4lowherewego
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1979 CJ7 
 
Join Date: Mar 2010
Location: Ohio
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mine does too....i dont let go of shifter often tho only 2 take a drink I have T14 to Dana20 in 72CJ5
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post #8 of 10 Old 05-01-2010, 07:50 PM
243
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1978 FSJ Cherokee 
 
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I am not sure if the T-150 and T-176 have similar shifter covers but if they do, the shift rods have grooves in them with a ball bearing and spring in the shift cover. When you shift into a gear, the poppet spring pushes the ball into the groove and holds it into place.

I don't think I have a picture of my shift cover disassembled but I will post a picture of the inside for comparison.

It would be worth a try to rebuild (disassemble and clean) the shift cover.

1978 Cherokee, TBI 360/T400/QT...6.0/6L80/NP241C in the works...

Last edited by 243; 05-01-2010 at 08:21 PM.
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post #9 of 10 Old 05-01-2010, 08:07 PM
jumbojeepman
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1976 CJ7 
 
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Location: Greenville
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One thing that can lead to this problem is leaving your hand on the shifter in between shifts. You should completely remove your hand from the shifter and your foot from the clutch in between every shift.
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post #10 of 10 Old 05-01-2010, 09:01 PM
243
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1978 FSJ Cherokee 
 
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Maybe this will help, the T-4 and T-5 appear to have similar top covers after looking at the FSM.

Cover with the shift rod retainers in place.




Retainer plates removed.




One shift rod removed and you can see the poppet ball. A couple of the springs in my cover were broken into several pieces.


1978 Cherokee, TBI 360/T400/QT...6.0/6L80/NP241C in the works...
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