Vibration 65-70 mph

Ever try a couple of those centering lug nuts ?
Wheel or hub out of round ?

 

The one I’m fighting is the same way. In neutral. Clutch engaged or disengaged. I even let the engine idle down at 600 while in neutral or in gear with clutch disengaged all at the speed range it happens. No change.

As long as the driveshaft is turning so is the trans even if it is in neutral. (Thats why you can’t tow without disconnecting the shaft. ) Just the input is not connected to anything.
I have a spin balancer in my shop and have dismounted and inspected and ruled out wheels and tires. Head scratcher for sure.

 

What brand of tires, and steel or aluminum wheel?

 

Also you need to ck. the air ride hi. valve and the arm that conn. to it with the rod pulled off so you can see if arm is worn out and moving where its conn. to valve, any slop in arm will make ride hi. go up or down on its own and make vib. like no ones business ?

 

What about torque rods, on cab and axles? Some of the new airliners have problems with ubolts getting loose, and wear plates going bad, making the rear axle(s) shimmy. 2017 seems kind of new to have rotten rubber bushings. Still worth a check. Motor mounts, cab bushings. Hood and radiator mount bushings. Front and rear Spring hanger bushings. Missing driveshaft weight, or driveshaft re installed 180 degrees off after changing u joints. All the usual suspects.

 

Things to Check
- tie rods
- drag link
- alignment
- wheel bearings

 

My 08 Nissan Pathfinder developed a front end vibration after sitting for 11 months .

I thought the front tires were flat spotted so rotated them. Same thing.

Than installed new front tires. Same.

Has them rebalance fronts. No changes

I than tore into the front wheel bearings even though I had just replaced both just 18 months ago

I found one that was suspect - cheap Chinese Autozone bearing- so replaced it.

Finally I got online and read where the front driveshaft being it’s 4WD can create this scenario of a shaking steering wheel.

I replaced the universals even though they were fine after a 180 thousand. Reinstalled in same position And still had the vibration.

I than removed the driveshaft and my vibration and steering shake disappeared.

I inspected the driveshaft looking for where maybe a weight fell off. Nothing.

Truck went down the road like a Rolls. Royce when I parked it.

Never really 4 wheeled or abused.

It’s like the driveshaft has gotta a twist in it.

My old parasail boat I had would develop twists in the 1 3/4 propshaft from the torque and heavy load of the parasails.

Long post but vibrations drive me crazy too.

The vibration through the steering wheel is what was driving me crazy.