highway "sway", need HELP!! - JeepForum.com
 
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post #1 of 15 Old 03-09-2010, 05:38 PM Thread Starter
grandneuman
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1998 ZJ 
 
Join Date: Apr 2009
Location: wyoming
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highway "sway", need HELP!!

I have a 98 zj with a 3.5 inch IRO lift and it has started to sway really bad when on the highway at speeds of 75+. This is not death wobble, had that before and corrected it by properly adjusting my front track bar. I will try to describe this "sway" i feel the sway more in my seat than the steering wheel and other passengers in the jeep can also feel it. It feels as if the whole jeep is going from side to side. Sometimes the sway is minimal but noticeable other times it feels as if I can not keep the jeep in a straight path. Have had it properly aligned by a professional. Any thoughts as to a fix, this jeep needs to get me to and from college next year. Thanks in advance.

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post #2 of 15 Old 03-09-2010, 06:03 PM
Technohead
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Has alignment of all four wheels been checked? Lifting changes the roll center and increases the amount of rear axle roll steer. High speed highway cruising and lifted suspensions are not compatible. My suggestion: slow down!
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post #3 of 15 Old 03-09-2010, 06:14 PM
BigRed4x4
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1993 ZJ 
 
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I had the "in the seat" sway right before I replaced my front trackbar. The ball joint at the frame was shot. It almost felt like the front axle was moving around under the body while it was crusing down the interstate.

'93 ZJ, 4.0L, D30 & D35, NP231, 4" Lift, 31" BFG's, Soft 8's, Painted Cladding, Glasspack, JVC Deck, CB, Lightbars, JKS Discos & TB, Tow Hooks Everywhere...more crap.
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post #4 of 15 Old 03-09-2010, 06:39 PM Thread Starter
grandneuman
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thanks, the front track bar is pretty new but i will check the ball joint. And how does one go about getting the alignment of the back tires checked?
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post #5 of 15 Old 03-09-2010, 07:17 PM
rustynail
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@ 3.5" of lift 70mph should be about the fastest you should go. The difference in fuel economy from just 60 to 70 is substantial. Check to see if your axle is centered, if it is not, adjust your rear track bar. If you don't have an adjustable rear TB, buy one.

- Russ
5.9 ORVIS 33x12.5 MTR-Kevlar, 7" fr adj IR LA's, 7" rr adj RE SF SA's, adj JKS TB's, RE SB disc, RE Springs, JKS ACOS, 13" RS9000XL's, OME SS, NP231, Durango box, IR Sliders, IR Skid, 3" Flowmaster 70, K&N, Superwinch EPi9.0, Optima Yel, 2 air comp, Alpine, Garmin, Sunroof
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post #6 of 15 Old 03-10-2010, 06:47 AM
94v8heep
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I triple vote the Trackbar, you may have to take off the tierod and check it. Mine looked good but when removed it was very sloppy.
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post #7 of 15 Old 03-11-2010, 12:49 AM
kwellzz
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check your swaybar link bushings for play.

IRO 3.5 * KM2 tires[265/75/16] * Thule 690xt M.O.A.B Cargo Basket*Kevin's TC Skid/Crossmember * IRO Premium Sliders * JKS Quicker Disconnects*JL Audio 10'' Stealthbox

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post #8 of 15 Old 03-11-2010, 02:24 AM
lateralus3
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i had the same exact problem. found out my rear trackbar bolts were loose, i tightened them up and the sway is gone. and 60 is as fast as i will go on the highway

Jacob

1994 grand cherokee laredo 4.0 IRO 5.5 critical path long arm kit and OTK steering 35x12.50x15 BFG KM2's

high pinion dana 30 and 8.8 in garage
my build thread

FOR SALE ONE SET OF ZJ D44A AXLE SHAFTS $150 SHIPPED
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post #9 of 15 Old 03-11-2010, 03:12 AM
Rickyb
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Slow down.
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post #10 of 15 Old 03-11-2010, 05:01 PM Thread Starter
grandneuman
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thanks for all the helpful advice, discovered a loose rear trackbar bolt, thinking this is part of the problem. Another question: i am looking at getting an adjustable rear trackbar and new sway bar. What companies make the best sway bars and trackbars. Thanks again.
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post #11 of 15 Old 03-11-2010, 06:31 PM
BigRed4x4
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JKS and IRO are the best for the TB's and most people go with the addco rear sway bar for an aftermarket part.

'93 ZJ, 4.0L, D30 & D35, NP231, 4" Lift, 31" BFG's, Soft 8's, Painted Cladding, Glasspack, JVC Deck, CB, Lightbars, JKS Discos & TB, Tow Hooks Everywhere...more crap.
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post #12 of 15 Old 03-22-2010, 06:50 AM
Apollo21
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sorry to bump this but i have the same problem on my wj around speeds of 55

Midshipmen Patrick 1/C USMMA DD: 2004 Golf GLS TDI 43mpg and 2002 Overland: Zone 4in, 32in Treadwright MTRs, IRO upper CAs, lift gate light mod, Alpine/Polk speakers, and power inverter with USB in dash mod, CB, custom rear swing out tire carrier Build thread http://www.jeepforum.com/forum/f22/a...thread-902929/ SOLD
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post #13 of 15 Old 03-22-2010, 07:01 AM
WJ-matt
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Quote:
sorry to bump this but i have the same problem on my wj around speeds of 55
We need more information on your WJ. Do you have a lift? If so how high of a lift? Have you cheaked your alinment? How about your links and bushings and your front trackbar, are they in good shape?

- http://www.jeepforum.com/forum/f197/wj-matt-build-1459459/
- Dude i think i know what your noise is...your jeep is telling me i need a beer....and your gonna need a bigger wallet.
- www.rcoverload.com
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post #14 of 15 Old 03-22-2010, 07:08 AM
Savasa
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Bad/shifted belt on one of your tires?
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post #15 of 15 Old 03-22-2010, 07:08 AM
Apollo21
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sorry i have a zone 4in lift, 32in MTRs retreads (less than 200 miles, just had an alignment), 3/4 KOR spacer up front, KOR SS, and a rear Addco

Midshipmen Patrick 1/C USMMA DD: 2004 Golf GLS TDI 43mpg and 2002 Overland: Zone 4in, 32in Treadwright MTRs, IRO upper CAs, lift gate light mod, Alpine/Polk speakers, and power inverter with USB in dash mod, CB, custom rear swing out tire carrier Build thread http://www.jeepforum.com/forum/f22/a...thread-902929/ SOLD
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