goodyear MTR's anyone use em - JeepForum.com

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post #1 of 16 Old 04-16-2009, 10:40 AM Thread Starter
txlegman
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goodyear MTR's anyone use em

285/75/16 on Moab wheel. Did a 4" RC lift with SYE and drive shaft still have vibrations. Checked and rechecked everything fit torque specs all is good. Starts to vibrate at 50 mph. Up to 50 mph it rides great. Could this be tires?


Last edited by txlegman; 04-16-2009 at 10:40 AM. Reason: left the question out
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post #2 of 16 Old 04-16-2009, 10:46 AM
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I've got an eerily similar issue with my new 35" KM2s. Does it feel like a tire issue or driveline issue? Did the shop road force balance them? Where is this vibe felt? Steering wobble or under the jeep? Does it shake anything else?

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post #3 of 16 Old 04-16-2009, 10:51 AM
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Yea, I use MTRs.Get your tires rebalanced.
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post #4 of 16 Old 04-16-2009, 10:53 AM
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Dont get fooled by the MT cause they suck in mud...

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post #5 of 16 Old 04-16-2009, 11:00 AM
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Have the shop balance them (your tires) to ZERO. You can also move tires around to attempt to isolate the offender.

http://www.jeepforum.com/forum/f9/diy-alignment-kit-steps-w-pics-2264465/
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post #6 of 16 Old 04-16-2009, 11:04 AM Thread Starter
txlegman
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Vibe feels like driveline have had the tires balanced twice. Runs good up 50 mph the it feels like bad U joints. Hardly noticeable in the steering wheel.
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post #7 of 16 Old 04-16-2009, 11:07 AM
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Did you dial in your pinion angle after the SYE?


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post #8 of 16 Old 04-16-2009, 11:14 AM
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Quote:
Originally Posted by dawnskaybug View Post
Dont get fooled by the MT cause they suck in mud...
Why would you assume Goodyear's MT/R is supposed to be good in mud? They are not a mud terrain tire and they weren't designed to be... they were primarily designed for rocks and resisting cuts from sharp rocks. And just in case you didn't know, the MT in MT/R does not stand for Mud Terrain... it stands for Maximum Traction/Reinforced.

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post #9 of 16 Old 04-16-2009, 11:17 AM
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Quote:
Originally Posted by txlegman View Post
285/75/16 on Moab wheel. Did a 4" RC lift with SYE and drive shaft still have vibrations. Checked and rechecked everything fit torque specs all is good. Starts to vibrate at 50 mph. Up to 50 mph it rides great. Could this be tires?
If it's the tire shimmying, it's just a matter of the tires not being balanced well enough. Get them balanced by a shop that knows how to balance big offroad tires. And in my local Discount Tire store, the only tire balancing machine they have that can get my 35" MT/Rs balanced perfectly is their Road Force machine. I have to INSIST they use it because it takes them more time to use. Otherwise I have to come back again because if they don't use the Road Force machine, my front end will shimmy from the tires not being balanced well enough. The bigger the tire, the more important it becomes that they are perfectly balanced.

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post #10 of 16 Old 04-16-2009, 11:27 AM
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Rotate the tires and check pinion angles.
If you think its a U-joint you can check your driveshaft u-joints easily by feeling for any play with your hand, its usually noticable if there is any. The front axles u-joints can be checked a similar way just more work. But use your hand to feel the play, a lot of the time you cant see it, just feel it.

the MT/Rs are awesome in the rocks, but they are loud as hell.

My 37" Iroks are quieter than my 31" MT/Rs were
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post #11 of 16 Old 04-16-2009, 11:36 AM
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MT/R's can be terrible to balance, when I took mine in to be Road Force balanced they felt that one should be replaced, it took 16 oz to balance.

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post #12 of 16 Old 04-16-2009, 03:08 PM Thread Starter
txlegman
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If it is tires out of balance would this show up as a vibe from under and shouldn't I feel in the steering wheel too?
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post #13 of 16 Old 04-16-2009, 03:40 PM
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Depends if the tire is on the front or the rear.

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post #14 of 16 Old 04-16-2009, 04:30 PM
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I had a similar problem w/ 06 rubicon stock with MT/Rs, I changed front rotors and brakes, had the front tires balanced to zero which helped out alot, I still had a bad shimmy at 50 mph when I would hit a pothole I then put on rancho 5000 front and rear and the problems have gone away
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post #15 of 16 Old 04-16-2009, 04:59 PM
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I have 31 x10.5 (15" wheels). No problems here, other than wear a bit faster than other tires I have had (mostly all terrains).



Quote:
Originally Posted by Jerry Bransford View Post
.....The bigger the tire, the more important it becomes that they are perfectly balanced.
Hey Jerry,

Is that still the same if you're running bigger wheels? Would a 35" tire on a 17"-18 wheel be just as hard to balance as a 35 on a 15"-16" wheel? Just thought I would ask, as I was curious if a tire's sectional height plays a role in balancing bigger tires.

Sorry for the off topic post.

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