Severe Shake Starts at 47 MPH

[ShadowsPapa]

Just wish I knew how they got messed up. Did the guy run over a 4x4 on the highway??? Definitely nothing obvious on the outside.

In one case I ran into - which was actually one of the toughest because of lack of other wheels and tires to swap with, I didn't find the exact cause until wheels were removed to be CNC restored/refinished. Then it was immediately apparent the wheel was very slightly out of round.
I'd had a dial indicator on all 4 of those wheels multiple times and the runout was in spec but I never noticed the slight egg-shape to one of them. I put the car on stands, put it in 4 wheel drive and let it idle spinning all 4 wheels and ran a pencil against the tires, checked the tread for runout and the whole bit. Likely road force balancing could have found it due to pressure applied to the tire. It was one of those things I'll never forget. It was the first time in my automotive lift I've not quickly diagnosed/found a vibration. And on my own car.
I think that's part of it and others seem to understand - I find it a lot easier to diagnose and fix things with other peoples' vehicles, it's my own I run into troubles with. Maybe I should have sold it then I could have found and fixed it right away!

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[Grump Fish]

In one case I ran into - which was actually one of the toughest because of lack of other wheels and tires to swap with, I didn't find the exact cause until wheels were removed to be CNC restored/refinished. Then it was immediately apparent the wheel was very slightly out of round.
I'd had a dial indicator on all 4 of those wheels multiple times and the runout was in spec but I never noticed the slight egg-shape to one of them. I put the car on stands, put it in 4 wheel drive and let it idle spinning all 4 wheels and ran a pencil against the tires, checked the tread for runout and the whole bit. Likely road force balancing could have found it due to pressure applied to the tire. It was one of those things I'll never forget. It was the first time in my automotive lift I've not quickly diagnosed/found a vibration. And on my own car.
I think that's part of it and others seem to understand - I find it a lot easier to diagnose and fix things with other peoples' vehicles, it's my own I run into troubles with. Maybe I should have sold it then I could have found and fixed it right away!

LOL! I know how that works too!
I always seem to have way more complicated issues with my own stuff than what I help other people with. I suspect that it's because people like us that generally fix our own stuff do not recognize the day-to-day challenges as "Issues". We understand it and just fix it in the course of the day. When we have an "Issue" its gotten serious!

 

[Stan H]

That's certainly a good way to nail down the issue.
Louisiana in August. Hoooooweee!

Do it at night ?..lol wow the heat.

 

[WK2JT]

There is one variable left and that is the shop completely removed the tires to install the sensors. Since they don’t have the road force balancing equipment, there is the possibly it’s just bad tire placement back on the rim. Hate to jump to conclusions and assume the worst of someone, but it does happen.

If it ends up being a rim, I have a set of perfect Rubicon take offs sitting in my garage. I’d be willing to break up the set for you if it comes to that. Fingers crossed it’s something much less serious.

 

[ShadowsPapa]

There is one variable left and that is the shop completely removed the tires to install the sensors. Since they don’t have the road force balancing equipment, there is the possibly it’s just bad tire placement back on the rim. Hate to jump to conclusions and assume the worst of someone, but it does happen.

If it ends up being a rim, I have a set of perfect Rubicon take offs sitting in my garage. I’d be willing to break up the set for you if it comes to that. Fingers crossed it’s something much less serious.

Not sure why any shop would go to all of that extra work to totally remove a tire or totally break it down just to install a simple TPMS sensor. I suppose there are foolish people out there working in tire shops, but it takes so little to break down one side and do the work.

 

[WK2JT]

Not sure why any shop would go to all of that extra work to totally remove a tire or totally break it down just to install a simple TPMS sensor. I suppose there are foolish people out there working in tire shops, but it takes so little to break down one side and do the work.

Totally agree, but I’m sure you’ve seen a thing or two in your time. Lol

 

[Jteakus]

Also have rims if you need some. I'm 2.5 hrs north of you. I have a complete set of JL Rubicon wheels and a complete set of JT upgrade wheels (black). If you need any let me know,

 

[REDBEAST]

I finally got the Mopar TPMS sensors for the Rubicon takeoff wheels & tires (~15K miles Falken 285 70 17) I bought for my wife's Sport Max Tow. Took them to a reputable tire shop in Alexandria La to have the sensors installed and the tires balanced yesterday. I installed them this morning and made a test drive. At 47 MPH, you can feel the truck start to shake and when you get above 50, it shakes severely with the steering wheel going back and forth.
I assumed the shop had botched the balancing job, though they've always done a great job for us. Took it back to them and they gladly re-balanced the tires and said they balanced perfectly. I actually watched the guy and he took his time to get it right. They test drove it and said they could still feel it a little, but didn't get it up to speed since the shop is in town. On the way home, same thing; shakes like crazy at 50+ MPH.
Took it back home and swapped the front tires, same thing. Swapped the rear tires, same thing. Each time I made sure the wheels seated correctly on the hubs and screwed the lugs on by hand and hand torqued to 130 ft Lbs.
Put the originals back on and it drives fine again.
I think I have a bad tire, but the tire shop said they could not see anything and it should show up when they are trying to balance it. Not sure what speed they balance at or if there could be something un-bonding in the tire that is changing with speed. I am thinking I need to just buy some new tires, but I'm a little concerned if it could be a wheel issue. Probably less likely since they balanced good though.

Any of you super smart people have any advice?

I had exactly the same problem so I rotated the front tires to the rear and the problem went away. I jacked up the right rear, disabled the ABS and put it in drive. A noticeable wiggle could be seen in the tread pattern indicating an internal flaw with the tire. My tires are more than half worn and have rotated them in the past with no problem until now. They are BFG KM3 M/T in 35/12.5X 17 mounted on 9.5" Dirty Life wheels. BFG has had quality issues lately and that may be the case with your tires.

 

[StingGrayJT24]

It’s nice to see others in the community offer to help out with replacement wheels.

 

[ShadowsPapa]

It’s nice to see others in the community offer to help out with replacement wheels.

When your hand is extended to give, it's also open to receive.

 

[Grump Fish]

There is one variable left and that is the shop completely removed the tires to install the sensors. Since they don’t have the road force balancing equipment, there is the possibly it’s just bad tire placement back on the rim. Hate to jump to conclusions and assume the worst of someone, but it does happen.

If it ends up being a rim, I have a set of perfect Rubicon take offs sitting in my garage. I’d be willing to break up the set for you if it comes to that. Fingers crossed it’s something much less serious.

I really appreciate that! Hopefully it's just bad tires, but Im not going to make any assumptions at this point. Im planning to take them to a place that has a road force machine when I get the new tires.

 

[Grump Fish]

Not sure why any shop would go to all of that extra work to totally remove a tire or totally break it down just to install a simple TPMS sensor. I suppose there are foolish people out there working in tire shops, but it takes so little to break down one side and do the work.

I do not think they completely broke them down. That was not the plan at least. I wasn't there when they did the work though.

 

[Grump Fish]

Also have rims if you need some. I'm 2.5 hrs north of you. I have a complete set of JL Rubicon wheels and a complete set of JT upgrade wheels (black). If you need any let me know,

Thanks! A lot of great people in this group. I'll sure let you know.

 

[Grump Fish]

I had exactly the same problem so I rotated the front tires to the rear and the problem went away. I jacked up the right rear, disabled the ABS and put it in drive. A noticeable wiggle could be seen in the tread pattern indicating an internal flaw with the tire. My tires are more than half worn and have rotated them in the past with no problem until now. They are BFG KM3 M/T in 35/12.5X 17 mounted on 9.5" Dirty Life wheels. BFG has had quality issues lately and that may be the case with your tires.

These are the original Falken 285 70 17 off of a Rubicon. Not sure what is going on. They look fine to me and the tire shop. Maybe when they get pulled off I can inspect the inside and see something.
My wife wanted 35s eventually anyway. This just moved up the time line.

 

[Grump Fish]

When your hand is extended to give, it's also open to receive.

Excellent way of putting this!

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