Severe Shake Starts at 47 MPH

[Lunentucker]

So the tires and wheels have ~15k on them.
What about the Sport? What's that mileage?

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[Grump Fish]

If you are looking at 35's, might as well look for a proper 8.5"-9.0" wheel to put them on.

Buying take offs when your end goal is something larger can be expensive. I have been there myself.

Thanks for the good advice!

 

[Grump Fish]

So the tires and wheels have ~15k on them.
What about the Sport? What's that mileage?

Less than 600. just got it about a month ago.

 

[Lunentucker]

Less than 600. just got it about a month ago.

I'm still leaning towards there being a steering component that's out of spec. A problem that's been very common in Gladiators. The larger tires and wheels are just bringing it to light.
It's a coin toss between that or damaged rims or a broken belt in the tires.
Have you swapped tires and rims front to back to see if the problem moves?

 

[Grump Fish]

I'm still leaning towards there being a steering component that's out of spec. A problem that's been very common in Gladiators. The larger tires and wheels are just bringing it to light.
It's a coin toss between that or damaged rims or a broken belt in the tires.
Have you swapped tires and rims front to back to see if the problem moves?

We have not swapped front to back. Only side to side. We talked about it, but it was getting way too hot and I was frustrated so we dogged it off til in the morning.
If your theory is correct, I could put the takeoffs on my Mojave, and put my Mojave set on the Sport, and get the same result! That would really drive me nuts!
I might try that experiment if the one-at-a-time swap doesnt work.

 

[Lunentucker]

We have not swapped front to back. Only side to side. We talked about it, but it was getting way too hot and I was frustrated so we dogged it off til in the morning.
If your theory is correct, I could put the takeoffs on my Mojave, and put my Mojave set on the Sport, and get the same result! That would really drive me nuts!
I might try that experiment if the one-at-a-time swap doesnt work.

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

 

[Max-t]

If there’s shake, it’s because something is allowing it. Unless the tread pattern and wear and alignment just happen to be magic together.

Got to check all the parts

 

[ShadowsPapa]

I'd definitely find a place to do a road force then. I can almost guarantee it's a wheel problem if it shakes consistently at certain speeds on different roads.

That's a pretty fair indicator that's it's tire/wheel.
Same speeds every time, no matter the road/street/highway, .

If there’s shake, it’s because something is allowing it. Unless the tread pattern and wear and alignment just happen to be magic together.

Got to check all the parts

???
Not true. That front end can be tight and a wheel or tire issue still shake the truck or steering wheel. Been there many times. Out of whack tire on a solid vehicle will still shake things.

 

[Grump Fish]

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

We decided, based on everyone's input, that we'll swap the tires/wheels on my Mojave with the takeoffs. Then put the Mojave wheels/tires on the Sport and drive both first thing in the morning. This should answer a lot of questions about tire size, weight, width, etc. and whether suspension/steering components on the Sport are marginal and being excited by the change.
After that, we'll see where the data takes us. I appreciate all of the input and I'll definitely follow up. Hopefully this adventure will help someone else one day.

 

[WK2JT]

Putting my money on your Mojave is going to shake… but I’m a terrible gambler.

 

[ShadowsPapa]

Describing tire issues -

I could refer to my factory training manuals and college books but gee, Google is SOOO much easier -

Talking about steering wheel shake, vehicle shake, etc -

A tire issue - belt issue, tire with lateral runout, out of balance, wheel issues, can all send vibrations through the whole vehicle typically 50 mph and above and even shake the steering wheel back and forth even if everything is unworn and tight.

 

[Grump Fish]

The verdict is in... Two bad tires/wheels. We've been switching tires and test driving for about 3 hours and can definitively say that two are bad, two are good.

To start with, we put two of the takeoffs on the front of the Mojave. It shakes like the Sport did.
Swapped the right front with another takeoff. Still shakes.
Put Mojave wheel back on right front. Still shakes.
Put the last takeoff on the left front. No shake. Marked it as good and direction.
Tried each of the other three takeoffs on front left. One no shake. Marked it as good and direction.
Tried the other two takeoffs on right front. Both shake.
Tried one of the good takeoffs on right front. No shake.

I think we covered all potential combinations and confirmed that we have two good ones that we an use as full size spares and that direction does not matter. I just hope it is the tires and not damaged wheels.

The moral of this story is... Dont buy takeoff wheels from random people on social media marketplaces and expect them to be completely honest.

Thanks for everyone's input and assistance on this. Hopefully this will help someone else down the road.

 

[Grump Fish]

Putting my money on your Mojave is going to shake… but I’m a terrible gambler.

You won that bet!

 

[ShadowsPapa]

The verdict is in... Two bad tires/wheels. We've been switching tires and test driving for about 3 hours and can definitively say that two are bad, two are good.

To start with, we put two of the takeoffs on the front of the Mojave. It shakes like the Sport did.
Swapped the right front with another takeoff. Still shakes.
Put Mojave wheel back on right front. Still shakes.
Put the last takeoff on the left front. No shake. Marked it as good and direction.
Tried each of the other three takeoffs on front left. One no shake. Marked it as good and direction.
Tried the other two takeoffs on right front. Both shake.
Tried one of the good takeoffs on right front. No shake.

I think we covered all potential combinations and confirmed that we have two good ones that we an use as full size spares and that direction does not matter. I just hope it is the tires and not damaged wheels.

The moral of this story is... Dont buy takeoff wheels from random people on social media marketplaces and expect them to be completely honest.

Thanks for everyone's input and assistance on this. Hopefully this will help someone else down the road.

Now why am I not the slightest bit surprised by any of this?

Glad it's resolved and proven to be just exactly what was expected -
truck = fine;
tires/wheels != fine

 

[Grump Fish]

Now why am I not the slightest bit surprised by any of this?

Glad it's resolved and proven to be just exactly what was expected -
truck = fine;
tires/wheels != fine

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.

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