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Old 09-23-2013, 10:03 AM   #1
Join Date: Jul 2013
Location: Staten Island
Posts: 92
Need help jeep shakes and jumps!

hello every one, as a new owner of a 1992 jeep i have some problems with it however there is one that i can't track down.

basically when i start the jeep and shift to first gear trying to go, the jeep starts shaking and jumping back and forth. that happens when i release clutch a little faster than turtle walks. If i release clutch extremely slow the jeeps goes fine. i have same problem with shifting to the 2nd gear, if i release clutch a little faster the jeeps starts to jump. I don't think this is normal and i want to fix it. Also want to mention that my front CV drive shaft is not installed. The engine mounts look solid. Please share any advices, i'd really like it to shift normally.
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Old 09-23-2013, 11:58 AM   #2
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Location: waco tx
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Do you have oversized tires on it, what size? May just need lower gears if so.

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Old 09-23-2013, 02:34 PM   #3
Join Date: Feb 2012
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it sounds like your flywheel may need to be resurfaced
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Old 09-23-2013, 02:43 PM   #4
1987Wrangler YJ's Avatar
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Yes, your flywheel may have been over heated and disformed
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Old 09-23-2013, 03:53 PM   #5
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Location: Austin, TX
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You might consider the TPS (throttle position sensor). I had similar bucking at low speed (although not exactly as you describe).
1995 YJ, 4.0L, AX15, 3" susp lift; Lock Right in Dana 30; 8.8 w/ARB; Flat Tummy Tuck, 1" Daystar BL; 1" MORE MML; 35" MT/r Tires;

StanF Tummy Tuck, Ford 8.8, Gas Tank Lift, Rocker Guard Fab, Ammo Can Console
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Old 10-04-2013, 08:12 AM   #6
Join Date: Jul 2013
Location: Staten Island
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thank you very much for help. i will have to check the flywheel, however i'm not a professional mechanic nor any where close and i'd like to ask if the fly wheel one of those things i'll need to bring to the shop to replace or it can be done at home? and approxmately how much in labor it might cost?
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Old 10-04-2013, 09:26 AM   #7
Join Date: Jan 2013
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2.5L or 4.0L? To access the fly wheel the you will need to remove the trans an TC. While you have access it would be a good time to replace the clutch, thow out bearing and slave cylinder. Also you will easier access to the rear main seal so make sure you check it and make sure it is not leaking.
1991 YJ 4.0L, K&N air filter, SS headers, 31X10.5, Congo Cage, etc...

When all hope is lost, and you have run out of options, you can always break out the "HOLY HAND GRENADE"!!!! It may not fix it, but you will feel a lot better.
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Old 10-17-2013, 09:59 PM   #8
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Join Date: Oct 2013
Location: S.E. Oklahoma
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That is a classic symptom of a dished out flywheel. Could just be from normal wear & tear, could be due to a leaking rear seal. I agree with CMike, do it all while you have the tranny out. You'll be better off in the long run.

1995 Rio Grande - 4"RC - 1/2"booms - 33's - 4:88's - 1"MML -
Belly up/302/NP435/NP208/8.8 swap about to start
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