I have a 93 Wrangler with brand spanking new Kumho Road Venture MT's on it (by the way I highly recommend this tire). Ok here's my issue - when I had the tires installed they were balanced and put on with an impact driver so they are tight. From 0-45 mph the jeep rides like velvet (or as close to that as a yj gets...) and then it will start to vibrate 45 mph and above. This is not death wobble...its more just a harmonic continuous and annoying vibration. When I get to about 65 mph it's not tolerable any longer and it's very rough. The passenger side tires of the jeep are wearing faster than the drivers side tires (The front tire faster than the rear) and it also appears like the outer part of the tread is wearing faster so that suggests a camber issue. Does this sound like a tire issue or a worn out u joint issue? Is there anything I can do to slow the uneven wear on my meats?
impact drivers should never be used to install tires. the nuts have a specific torque requirement. maybe they are too tight. also if you get a flat it maybe impossible to remove the nuts with standard lug nut equipment. i know of what i speak........it happened to me when the dealership rotated my tires on a new vehicle i had.
TREAT EVERY STRESSFUL SITUATION AS A DOG WOULD.
IF YOU CAN'T EAT IT OR PLAY WITH IT,
JUST PEE ON IT AND WALK AWAY.
HEY KILZ..(birtydugger usa captain!), lol....just saw ur thread..have u removed the rear trackbar yet??...if not...remove it!!...not needed..if its standard length and hasnt been relocated( or removed completely!) it will twist and force ur jeep down one side causing it to camber! and the vibration u described are similar to what i had and it was a u-joint on rear driveshaft..remember they're gonna wear alot faster with the locker..my kumhos all run on 25psi of air!..and remember they are directional!! (hope u installed them right way around!??..lol),..and i only torque my wheel nuts up to 95ft lbs!! all nice n even,,,hope this helps?...good luck buddy
Yea they are tight but I still got the muscles to break them free
Some more info - I thought it might be the steering stabilizer so I put on a new one. Hasn't helped. I'm leaning towards it being driveshaft related because it gets worse the faster I go after 45mph. I'm gonna test the u-joints out today and see if I can find and bad wiggle or wear on them. I'm not really sure how to test the driveshafts for wobble tho...Do you completely remove the driveshaft and then take it for a test drive?
Birtydugger! I'm running my tires at 32 psi and yes I got them spinning the right way - it sounds like the rear track bar is messin with my tires...I'm gonna rip that thing off ASAP. While I'm under there I'll check the u joints... I'm sick of the vibration but the tire wear is ticking me off more haha.
hey again kilz..id get the trackbar off too!!! will release the twist its causing!...and i still think 32..is too much!!...remember u gain an extra 2 PSI when they reach normal running temps!! then they're 34psi!!!..and yes a good idea to remove rear driveshaft...put in 4wd...and take a small trip...see what happens??
Ok - things to do today: 1. Decrease air pressure to less than 30psi (optimum 25). 2. Get the dang rear track bar off (it's nuts are currently receiving the deep soak compliments of PB Blaster). 3. Take off rear driveshaft and see how she does in 4x4. Ok...much to do I'm hoping that by taking off the rear track bar it will eliminate some or all of the vibration. I'd rather it not be a driveline issue...
Birtydugger I'm getting the logo printed out asap for my Jeep - excited to put it on and join the UK club
kilz u gonna be a busy jeeper!!...and again..i have no tyre wear at all and i found 25psi ideal all year on any terrain..in mud or snow i might lower to about 20psi..but she sits and grips good. and yes take trackbar off and i would lose the front 1 too..i dont regret doing mine and our jeeps are a similar set up..size/weight. do the t/bars first then see how she sounds and feels?..let me know kilz i keen to know what it is too! afterall u are our overseas birtydugger branch"!.lol (we put the logo letters above the skull..looked better on top of the windscreen..and the birty skull on its own on the side panels or rear!...chat soon! good luck
I run the old style non directional kumho 834, and they took the guy a while to balance. He used quite a bit of weight. I would take them to a different shop and have them balanced again just to be sure. 45-50 mph is when you would typically feel the symptoms of an improperly balanced or unbalanced tire, and it would get worse from there up.
This problem just showed up after you put the new tires on, correct?
I have yet to see a jug nut i put on with the impact not come off with a standard lug nut wrench, now mind you i use a toque stick to limit the torque applied to the lug nuts.
If you have to apply more than 4 weights to a wheel you either are, A: doing it wrong B: have a machine that need calibrated or C: just a d@mn moron who needs to learn how to balance a tire. I understand you were not the one who balanced or mounted the tires, its more of a general statement about people who have to spin the tire more than 3 times.
i have no experience removing the track bar as both of mine are still in place on a 4" lift, im sure the vibration im getting is from a tire imbalance as i just bought used wheels and tires and slapped them on for the winter...although it dont take much for me to take them into the shop i work at and balance all 5.
as far as alignments go on these things camber and caster are not really adjustable, unless u bend an axle tube lol, id look at toe if the outer edges are wearing. but hey what does a stealership @ss wipe know...i know nothing...thats what
Ok I took off the rear track bar and decreased air pressure in my tires. As expected it made the ride much smoother and decreased the vibration. I'm gonna take the front off when I get the JKS telescoping track bar (I'm just not comfortable without one in the front) However the vibration is still there just not as bad - I'm gonna get the tires re-balanced and rotated then check my toe. Might just have my mechanic align it as best he can but honestly I don't want to give him money for something I can do.
- When I read about the evils of drinking I stopped reading
Good news kilz,..sounds like re-wheelbalancing might solve the problem!, but try driving around with ur front trackbar off for 10-20mins, it doesnt feel any different...until u go offroad and realise how much flex u have!!..i bought the telescoping trackbar as u know...and it sorta worked! but i did get alittle "bump-steer when it was tightened up?! i removed it about 2 yrs ago..(still in my garage). i know u have the swaybar discos i think they are actually better they are there to balance and stop the slight roll feel u get, and would save u $200!...
The wear on my tires is in the outside part of the tread - I measured my toe using two 4' levels strapped to the outside of my tires. The toe measure showed that the front of my tires was 5/8" closer together than the rear. Looks like I'm about a 1/2" toed in more than I should. That is what's causing the wear for sure... But I can't get the tie rod to turn to adjust the toe out. I'm thinking a big pipe wrench will do the trick but that's a gamble... It's really tight on there.
- When I read about the evils of drinking I stopped reading