Vibration in Steering wheel

This post gave me pause. My 4R will do a lot of highway miles and not all good roads.

I’m going to deflate to 45psi and see how she rolls. And continue until I get to a lower psi that doesn’t vibrate my arms off.

 

amazing how many people dont realize this

my good buddy has an f250 with 35’s. they say 50psi max and thats what he runs because he thinks that is where there should be

it’s horrific offroad and dynamiting the brakes at 50mph on the rural highway at stop lights seems right on the edge of dangerous.

i had 37’s on my f250 and ran 25psi rear and 30 front around town

the 4r in my pic has 265 ko2’s and i ran 32psi front and rear.

 

I was the July bought it 4runner 2016,,,,,,,,,,,,,, Nov 2016 3,ooo miles .. the CHANGED engine oil ... 0-20wt Mobil syn oil .... the factory is a engine oil is the variation of those engine oil factory ..
also the rear diff is a grayish gear oil 3,ooo miles DRAINED IT ,,, and the Mobil syn 75-90wt filled it .. then 6 yrs ago of the rear diff is a great rear diff oil very clear a honey color ..

 

Hence the reason I’m going to start deflating. The roads here in Hampton aren’t great and around 5-0 mph the braking hasn’t been bad and that horrible vibration is almost gone. I’m hoping at 38 or so it doesn’t come back. Next tires will be better than what I have on it now.

 

interesting. I thought bfgs ko2s were the bees knees of tires. So at least I remember back in the Jeep world.

Dropped my to 35psi and it runs great on the highway. I never had a steering wheel shake but did feel stuff in the driveline, just completed a 320mile trip and it’s a beauty.

 

yes the 38 psi of those tires 7 years ago to todays very good ....the tires are the treads rotating it and all those tires are the same threads .........
no vibrations the steering wheel is correct ...

 

Deflated to 44. Vibration is back but not as bad as at 35psi. I guess I have this to live with until new tires are necessary

 

Your tires shouldn't be shaking your arms off. Maybe there is a problem with one or more tires, or wheels. (Is there another shop you could try?)

edit i dont know i'm not a mechanic

 

We are still trying to figure it out.

 

anybody try to adjust toe to max, i.e. 0.32 (0.16 each) ? toe-in may "load" bearings race, eliminating "wandering", that may be in bearing with wheel of 0 toe. does it make any sense? don't kill me, it's 4am

 

I’ve often thought I’d give that a try that if I had shimmy. Makes sense to me.