the wobbles - Pirate4x4.Com : 4x4 and Off-Road Forum

TJsahara · 12-11-2007, 10:50 PM

yea I know that death wobble is covered numberous times every day, but i have something that is a little different. My TJ only gets the shakes when people are sitting in the back seat. Me and another person... nothing. But when people are in the back she wants to wobble around 35-40 why would this be? Would that really change the geometry enough to cause the shakes? They are not hella bad but just enough to make me wonder about it.

Floydargue · 12-12-2007, 12:05 PM

I don't think I'll have an answer, but where is the shake seeming to come from? Are you feeling it more in the steering wheel, or does it feel more like a chassis shake?

resqme · 12-12-2007, 12:25 PM

I think one of two things is happening...

Either you have a balance problem or bent rim on the rear axle that is becoming more pronounced when you weigh down the rear end,

or

You have a CV style driveshaft that is going slightly out of line when you add weight to the rear end.

Just how big is your back seat girlfriend?

jpfrk2001 · 12-12-2007, 12:26 PM

I've never heard of this? this is a first

Is your jeep lifted?
Possible slight change in pinion angles due to increased load in the rear causing a slight vibration in rear driveline??
Or is it really a wobble felt in the steering wheel?

TJsahara · 12-13-2007, 09:23 AM

yea it has a RE 3.5" standard lift and the shake is in the front axle for sure nothing to do with the rear. I can see it out of my window the front tire kinda wobbles like its slithering like a snake just back and forth. I have a RE adjustable track bar on it but i dont think that would be an issue

jpfrk2001 · 12-13-2007, 11:31 AM

steering stabilizer? maybe?

TJsahara · 12-13-2007, 12:55 PM

yea i was thinking that too, the one that's on it has been on there since my dad bought it new in 98, and it has a lil over 260,000 miles on it. hehe

soilantgreen · 12-13-2007, 02:44 PM

I'd put it on jackstands and start shaking the trac bar and the control arms looking for a worn out bolt or the hole around that bolt being opened up due to wear.

Either that or take out the rear seat like we do.

87 pathy · 12-13-2007, 08:55 PM

well, since its' been lifted, and more wight in the back.. it is theoretically possible that your caster angle is off.

12-11-2007, 10:50 PM	#1 (permalink)
TJsahara Registered User Join Date: Dec 2006 Member # 83642 Location: north carolina Posts: 46	the wobbles yea I know that death wobble is covered numberous times every day, but i have something that is a little different. My TJ only gets the shakes when people are sitting in the back seat. Me and another person... nothing. But when people are in the back she wants to wobble around 35-40 why would this be? Would that really change the geometry enough to cause the shakes? They are not hella bad but just enough to make me wonder about it.

12-12-2007, 12:05 PM	#2 (permalink)
Floydargue Registered User Join Date: Dec 2006 Member # 83814 Location: Salt Lake City Posts: 166	I don't think I'll have an answer, but where is the shake seeming to come from? Are you feeling it more in the steering wheel, or does it feel more like a chassis shake? __________________ 1999 XJ/4.0L/AX15/Atlas 4sp (10.34)/Currie 9"/Waggy D44/35" Krawlers/ARBs front and rear

12-12-2007, 12:25 PM	#3 (permalink)
resqme Zeus of the Sluice Join Date: Aug 2003 Member # 21815 Location: Pollock Pines, CA Posts: 3,342	I think one of two things is happening... Either you have a balance problem or bent rim on the rear axle that is becoming more pronounced when you weigh down the rear end, or You have a CV style driveshaft that is going slightly out of line when you add weight to the rear end. Just how big is your back seat girlfriend? __________________ WWDD? N6YBH - "If you need a tool and don't buy it, you will ultimately find that you have paid for it but don't have it". -Henry Ford Use Goodsearch and support the Rubicon Trail Foundation.

12-12-2007, 12:26 PM	#4 (permalink)
jpfrk2001 New Beginnings Join Date: Sep 2007 Member # 99513 Location: On the move Posts: 4,244	I've never heard of this? this is a first Is your jeep lifted? Possible slight change in pinion angles due to increased load in the rear causing a slight vibration in rear driveline?? Or is it really a wobble felt in the steering wheel? __________________ My jeep is a hotrod! /forum/jeep-hardcore-tech/658004-going-against-odds.html NEW BEGINNINGS: /forum/general-4x4-discussion/971511-jealle-o-cigano.html

12-13-2007, 11:31 AM	#6 (permalink)
jpfrk2001 New Beginnings Join Date: Sep 2007 Member # 99513 Location: On the move Posts: 4,244	steering stabilizer? maybe? __________________ My jeep is a hotrod! http://www.pirate4x4.com/forum/showthread.php?t=658004 NEW BEGINNINGS: http://www.pirate4x4.com/forum/showthread.php?t=971511

12-13-2007, 09:23 AM	#5 (permalink)
TJsahara Registered User Join Date: Dec 2006 Member # 83642 Location: north carolina Posts: 46	yea it has a RE 3.5" standard lift and the shake is in the front axle for sure nothing to do with the rear. I can see it out of my window the front tire kinda wobbles like its slithering like a snake just back and forth. I have a RE adjustable track bar on it but i dont think that would be an issue

12-13-2007, 12:55 PM	#7 (permalink)
TJsahara Registered User Join Date: Dec 2006 Member # 83642 Location: north carolina Posts: 46	yea i was thinking that too, the one that's on it has been on there since my dad bought it new in 98, and it has a lil over 260,000 miles on it. hehe

12-13-2007, 02:44 PM	#8 (permalink)
soilantgreen F the Gub'ment! Join Date: Mar 2006 Member # 70321 Location: Writing angry letters to anti-2A legislators--like you should be doing! Posts: 3,164	I'd put it on jackstands and start shaking the trac bar and the control arms looking for a worn out bolt or the hole around that bolt being opened up due to wear. Either that or take out the rear seat like we do. __________________ http://www.spiderwebshade.com/

12-13-2007, 08:55 PM	#9 (permalink)
87 pathy Registered User Join Date: Nov 2005 Member # 57166 Location: puyallup Wa Posts: 474	well, since its' been lifted, and more wight in the back.. it is theoretically possible that your caster angle is off. __________________ 87 pathfinder HPD44 wristed radius arm, yukons, super joints, detroit True hi9 spooled 4 link 5.38's WH variable rate coils on all 4.

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