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post #1 of (permalink) Old 12-11-2007, 04:44 PM Thread Starter
 
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Unhappy Transmission/Transfer case issue?

I was accelerating from a turn, probably about 20-25mph when my gears seemed to lock up. Just trying to get the stick out of gear is nearly impossible without seeming like I'm going to break something. Once in neutral, I'm unable to get it back into gear as normal, no matter what the clutch position is. If I shut the Jeep off, I'm then able to move through the gears. As soon as I turn it back on, I'm locked out again, leading me to assume somehow the engine is locking up the transmission?? Possible broken engine mount? A broken transmission mount? Something inside the transmission? Can anyone give me advice on where to start looking? I had a brief chance to look underneath the Jeep, and could find any obvious damage. Any help is appreciated!

1986 Jeep CJ7, 258, T-5
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post #2 of (permalink) Old 12-11-2007, 04:52 PM
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Syncros... I'd say it's tare down time...
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post #3 of (permalink) Old 12-11-2007, 06:58 PM
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Sounds to me like the clutch is gone.
Engine off it shifts OK, engine running it's near impossible to move it.
Clutch is allowing the input shaft to keep turning no matter what. Copuld even be a lockud up pilot.

A broken synchro blocking ring would be felt either way.

Try this - park on a flast surface, brakes off. Put it in High, start engine - if it tries to creep suspect clutch or pilot bearing/bushing.
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post #4 of (permalink) Old 12-11-2007, 07:23 PM
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problem with trans

hi i have a cj8 and i may be complete wrong but check the hyd fluid in the clutch also how does the pedal feel you may just be low or you have air in the system that need to be fixed and bleed out the line
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post #5 of (permalink) Old 12-11-2007, 10:23 PM
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Hey Rich,

What does that mean ? I guess I missed it!

Quote:
Try this - park on a flast surface, brakes off. Put it in High, start engine - if it tries to creep suspect clutch or pilot bearing/bushing.
Did you mean to have the clutch in?

Scott
1985 CJ7 T.H.O.R

"He brought me up out of the pit of destruction, out of the miry clay, And He set my feet upon a rock making my footsteps firm."
-Psalm 40:2
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post #6 of (permalink) Old 12-11-2007, 11:18 PM
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Sorry, yes, have the clutch pushed down all the way when you try that.

Sounds like the trans input shaft is still turning because something is dragging, not releasing all the way.

Unusual, but sometimes the disc's lining comes loose and drags.
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post #7 of (permalink) Old 12-12-2007, 07:23 AM
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Instead of doing that on a flat surface, jack up the back end, start the engine, put it in top gear and let the clutch out. The wheels will spin. Then put the clutch in and shut the engine off. The wheels should continue to spin, taking quite a while, maybe 30 seconds, to stop. If they stop quickly, the clutch is dragging.

EVERYTHING's easy for the guy who doesn't have to do it.
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post #8 of (permalink) Old 12-12-2007, 12:10 PM Thread Starter
 
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Thanks for all of your replies! I will check my clutch tonight. Hopefully the clutch is the issue--I have no experience with breaking down a transmission, and I'm sure that could get expensive.
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post #9 of (permalink) Old 12-12-2007, 05:36 PM
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I pulled a clutch out of K5 blazer that was doing the same thing and it turned out to be one of those coil springs laying flat in the clutch disc that had popped out and binded up in the pressure plate not letting it release....
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