post #1 of Old 08-28-2011, 03:00 PM Thread Starter
Darrin29
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1980 CJ5 
 
Join Date: Jun 2011
Location: Pensacola
Posts: 4
Rabid Vibrations!!

Im new to the site. have a question as im not much of a mechanic.
over the course of a couple days ive had a minor vibration turn into a violent one. Shook my mirror off! Where should I start? The vibration is load dependent. free wheel, no problem. I realize this is probably common knowledge to most. thanks for any help.

Darrin

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post #2 of Old 08-28-2011, 03:17 PM
Mike Romain
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1986 CJ7 
 
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If it is not in the steering wheel, then I would be blocking the wheels, putting it in neutral and go under to shake and twist the rear driveshaft expecting to find slop at a u-joint.

If in the steering strong, then I would have someone turn the steering wheel side to side while I was under the front looking for a moving part that has slop or up and down movement.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #3 of Old 08-28-2011, 03:31 PM
trj1393
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could it be the legendary Jeep Death Wobble???
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post #4 of Old 08-28-2011, 07:04 PM
gojeepin
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Quote:
Originally Posted by Darrin29 View Post
Im new to the site. have a question as im not much of a mechanic.
over the course of a couple days ive had a minor vibration turn into a violent one. Shook my mirror off! Where should I start? The vibration is load dependent. free wheel, no problem. I realize this is probably common knowledge to most. thanks for any help.
Beside the info you gave us about it being load dependent, there are several things we need to know to help.
Does it occur at all speeds?
Do the wheels wobble?
Do you feel it in your seat/feet or is it in the steering column?

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #5 of Old 08-29-2011, 04:57 AM Thread Starter
Darrin29
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Join Date: Jun 2011
Location: Pensacola
Posts: 4
Quote:
Originally Posted by gojeepin

Beside the info you gave us about it being load dependent, there are several things we need to know to help.
Does it occur at all speeds?
Do the wheels wobble?
Do you feel it in your seat/feet or is it in the steering column?
Hi and thanks. It is worse at 30-40 mph. Smooths a bit at higher speeds. I feel it in the steering column. The wheels don't wobble and when you let off the gas it stops.
Thanks guys
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post #6 of Old 08-29-2011, 06:00 AM
gojeepin
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Are your front hubs unlocked?

It sounds like your front driveshaft... you don't have the transfer case in 4-wheel high do you?

BTW... my son's moving to Penscola in mid-September...

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #7 of Old 08-29-2011, 07:55 AM Thread Starter
Darrin29
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Location: Pensacola
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No, hubs aren't locked. I'm gonna have someone look at it for me today. Tell your son to hit me up when he gets here. Few good jeep spots around.
Bogs and boulders. Great park about an hour away. Look at the website.
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post #8 of Old 08-29-2011, 08:23 AM
zeronight
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1982 CJ7 
 
Join Date: May 2009
Location: Festus,MO
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Take a look at this . i had vibes just like your describing and here is what i did to fix it.
good luck

http://www.jeepforum.com/forum/f8/da...-yoke-1244355/
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post #9 of Old 08-29-2011, 09:04 AM
Noplainsdrifter
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My money would be on bad u-joints!

It's a Jeep Thing, Chrysler Doesn't Understand!
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post #10 of Old 08-29-2011, 11:43 AM
gojeepin
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Quote:
Originally Posted by Noplainsdrifter View Post
My money would be on bad u-joints!
That's why i asked if he felt it in the feet/seat. That's usually where a rear driveshaft imbalance is felt.

Since the vibration is tied to driveline load, it's driveshaft related. Unless pinion and transfer case angles have been changed, I'd recommend checking the u-joints too.

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #11 of Old 08-29-2011, 05:27 PM Thread Starter
Darrin29
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Location: Pensacola
Posts: 4
U JOINTS!!! ding ding!!! You guys are right, I'm stupid, but learning and thankful for the advice.

Darrin
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