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Unread 04-12-2012, 09:15 AM   #1
cjkish86
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1997 ZJ 
 
Join Date: Feb 2012
Location: rancho cucamonga, california
Posts: 30
97 zj jumpy when taking off

Hi everyone. this is my first post I've usually been able to find someone else post helpful but i couldn't find anything that exactly described my problem so here it goes.

i got a 97 zj 5.2 w/ 249 t-case. i want to say it has something to do with the transfer case or transmission but I'm not 100% positive. only when i take off from a dead stop its real jumpy/vibrates until I'm half way through 2nd gear. both axle are good checked for metal shards, clean gear oil, play in pinion's and checked all my u-joint on the drive shafts and everything is good.

how would i know if the transfer case is going out? what kind of symptoms would i have? i plan on swapping for a 231 once this t-case goes out as well. but i want to figure out this problem before anything.

if anyone can help that would be great. I'm trying to get her going as soon as possible. I'm missing out on too many trips as it is.

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Unread 04-12-2012, 10:38 AM   #2
mdm
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2000 TJ Wrangler 
 
Join Date: Apr 2005
Location: Elkmont, AL
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Motor mounts
Transmission mount
Drive shaft

Welcome to the forum.
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Unread 04-12-2012, 11:37 AM   #3
cjkish86
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1997 ZJ 
 
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Location: rancho cucamonga, california
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alright thanks ill check the mounts. as far as the drive shafts should i have them rebalanced?

thanks again.
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Unread 04-12-2012, 11:44 AM   #4
mdm
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Quote:
Originally Posted by cjkish86 View Post
alright thanks ill check the mounts. as far as the drive shafts should i have them rebalanced?
thanks again.
u-joints
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Unread 04-12-2012, 12:48 PM   #5
cjkish86
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what if its none of the above?
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Unread 04-12-2012, 12:50 PM   #6
thirdeye
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kinda sounds like the trans mount
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Unread 04-12-2012, 01:57 PM   #7
mdm
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Quote:
Originally Posted by cjkish86 View Post
what if its none of the above?
Then you start looking for other causes. Would you rather remove your transmission and rebuild it just to find out that it was the transmission mount?
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Unread 04-12-2012, 02:06 PM   #8
cjkish86
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i already replaced my tranny mount a few months back. I'll double check everything just to make sure and replace my motor mounts. I'm sure they are pretty worn out.

but yeah hopefully that will be the worst of it.
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Unread 04-12-2012, 03:25 PM   #9
mdm
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Quote:
Originally Posted by cjkish86 View Post
i already replaced my tranny mount a few months back. I'll double check everything just to make sure and replace my motor mounts. I'm sure they are pretty worn out.

but yeah hopefully that will be the worst of it.
Don't overlook the "new" transmission mount just because you recently replaced it. "New" doesn't always mean "good".
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Unread 04-13-2012, 08:51 AM   #10
cjkish86
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good point. yeah might as well change them all out. thanks again.
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Unread 04-15-2012, 01:01 PM   #11
cjkish86
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1997 ZJ 
 
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Replaced the motor mounts didn't make any difference. we put her on jacks to check for any bad noises coming from the tranny or t-case and there was a winding noise coming from the tranny. Weird thing was when we dropped it and took it for a test drive. The original problem didn't exist anymore but now when in park and reverse it feels like its in gear but doesn't move and in neutrial it drives. I'm pretty sure that means the tranny is going out
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