motor mounts - JeepForum.com

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post #1 of 20 Old 03-05-2013, 12:44 PM Thread Starter
jeep93GCL
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motor mounts

Hey has anybody change their motor mounts on their jeeps is hard and how many mounts is it. When I drive the vibrations goes away when I stop at a red light or stop if vibrates but once I drive away it goes away I was thinking it was the motor mounts has anybody had this problem before....

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post #2 of 20 Old 03-05-2013, 01:02 PM
xcaliber81
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I do exact same thing however by tuning it up and putting feel cleaner in the tank I am narrowing it down to old dirty injectors and worn mounts.
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post #3 of 20 Old 03-05-2013, 01:20 PM
a20ftsloth
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Correct me if I'm wrong but I think it might be two. I'd probably just google it if I were you. Just crawl under there and see if they're dry rotted. But honestly if it goes away at high rpms then it's not the mounts. If I were you I would get in the car, drive down the block, and stop but keep it in drive. Try putting it in neutral and if the vibrations go away then it's your tranny. The best solution is to go home, pull the parking brake, put the car in neutral with the car still on, and check the transmission fluid. If I'm right then you're going to want to add some fluid and that should help it. Basically your tranny is still grabbing the engine a bit at stop and that's what causing the vibrations. So ill say it again; parking brake, turn engine on, put in neutral, and fill tranny till full.
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post #4 of 20 Old 03-05-2013, 01:27 PM
Scopez
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What motor? To test worn motor mounts, put the jeep in drive, hold the brake and give it a little gas. Do the same in reverse. If your motor moves any, more than likely bad mounts.

I suggest IronMan4x4fab mounts. I ordered some, but I haven't received them yet. I just heard very good things about them.

94 ZJ Laredo. 5.2 Crate engine. 6in JKS SA Lift. 33in Destination MTs. ARB Front Bumper.
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post #5 of 20 Old 03-05-2013, 01:30 PM
xcaliber81
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My tranny is full and it does it mine is slowly diminishing over time I'm thinking my issue is old dirty injectors or worn mounts more gearing towards the trans mount.
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post #6 of 20 Old 03-05-2013, 01:53 PM
CanaanTSA5
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Quote:
Originally Posted by jeep93GCL View Post
Hey has anybody change their motor mounts on their jeeps is hard and how many mounts is it. When I drive the vibrations goes away when I stop at a red light or stop if vibrates but once I drive away it goes away I was thinking it was the motor mounts has anybody had this problem before....
The I6 4.0 has 2 mounts. The mounts them selves are easy to replace. The only snag is that you need to lift up your motor to do it.

I am currently dealing with the same kind of vibration issue. When I come to a stop, the front end will shake. Sometimes violently, sometimes just lightly. In my case, I narrowed it down to more than one thing wrong. My transmission wouldn't downshift properly (Gears 2 and 1). The converter lockup valve in the transmission valvebody was sticking.

I put in some Automatic Transmission Treatment fluid and that solved the vibration issue about 75%. I'm assuming that it also needs motor and transmission mounts as well. It's 14 years old and gets the hell beat out of it. Not really what the stock mounts were intended for.

Other than that, you could try cleaning your IAC. That's what's next on my list before I spend the money for mounts.

1998 ZJ 4.0 Stock 225/75R15 General Grabber AT2
191,000mi
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post #7 of 20 Old 03-05-2013, 01:54 PM
biggoofy
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If you want to upgrade while you swap check out ironman4x4fab.com. They have motor and trans mounts for all Zj models.

Zack

96 ZJ HP44 / 9"
90 XJ on 33s
RIP Troy aka BigBlueZJ94

FroBot Fab FTW

My Build


Need quality parts call Andy at Ironman4x4fab!!!!!
http://ironman4x4fab.com/index.html
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post #8 of 20 Old 03-05-2013, 05:29 PM
coralman
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I think he was looking for a how to, I wouldn't mind knowing myself.

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Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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post #9 of 20 Old 03-05-2013, 06:10 PM
KoreaZJ
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Replace all three, L/R engine and rear tranny.

Not a ZJ, but similar to this...
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post #10 of 20 Old 03-05-2013, 08:07 PM
coralman
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I was just wondering about the board under the oil pan thing, if it was the accepted method Thanks Korea.

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Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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post #11 of 20 Old 03-05-2013, 10:07 PM
Afdude88
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The board idea should be ok. The idea is to distribute the motor weight across the board versus a the smaller area of a jack's head. I have done this before on other vehicles without problems.

1993 Grand Cherokee Limited 4.0L AW-4

1998 Grand Cherokee: 4.0L I6, 42RE, np249 (ugh), stock (ugh)
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post #12 of 20 Old 03-06-2013, 12:49 AM
AVR2
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I used the block of wood under the oil pan on my 4.0L. No problem. It's the recommended procedure in Haynes, can't remember what the FSM says.

The driver's side mount is the one where access can be an issue. I've seen people change it as-is, but I took a few minutes to pull the airbox, and voila - plenty of room.
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post #13 of 20 Old 03-06-2013, 04:25 AM
coralman
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.....and the gear shaft? Some say remove or pry on, nothing in the fsm about that. I was just thinking I would tackle the mounts while doing all the rework on the sus./strg systems.

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http://www.jeepforum.com/forum/f13/c...-faqs-2863665/

Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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post #14 of 20 Old 03-06-2013, 04:37 AM
AVR2
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You mean the steering shaft? There's just enough room between it and the frame to get a socket onto the bolts underneath it. That wasn't a problem at all.
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post #15 of 20 Old 03-06-2013, 04:44 AM
coralman
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Cool, thanks for the replies !

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http://www.jeepforum.com/forum/f13/c...-faqs-2863665/

Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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