Shaking/Vibration at 65-75 MPH

Sounds like a driveline vibration to me..

I would be getting the driveshaft angles checked and the balance

 

a factor that happens on vehicle at speed IS

the tyre heat up.............yes it matters simply because most off road type tyres

with moderate to wild treads DO NOT Heat up evenly

the tread & rubber shifts

balance done on machines...............everyone has been advised for ages to set pressures

no less balance when tyre are cold

IF at ALL Possible run Michelin with a HI-way tread might be definitive

 

They are Eibach shocks that came with the Boss lift kit. They are only about a year and a half old, about 10k miles on them. I have been thinking this as well. Rides rough, mainly on the driver side even below highway speeds.

 

Good call. Getting that done tomorrow at a local off-road, performance shop. Fingers crossed.

 

Hope you find it. Sucks not enjoying your truck and worse not knowing what the problem is.

 

Trans mount? I had the same kind of vibration and the trans mount was toast it looked to be the original.

 

Get your tires balanced with a dynamic Option which is a different way of balancing your tires

 

UPDATE: The performance shop I brought it to used this type of balancer. They said one tire was WAY out of balance and the other 3 were slightly out of balance.

Funny thing is- Discount Tire literally mounted and balanced these yesterday! Drove home and it shook like an earthquake. They mounted my KO2s back up because I had them put on a set of Cooper AT3 4S just to see if it was the tires. The Cooper Tires actually shook worse than my KO2s. They were brand new, mounted and balanced at Discount Tire, using the Hunter Road Force Balancer.

I have had my KO2s and OEM TRD PRO wheels balanced 4 times at Discount Tire. They were road forced every single time and they told me each time, "they were balanced." I would always leave and the thing shook like crazy.

After the dynamic balance at the indepednant shop, the wheels and tires are back to pretty much normal. It felt like a totally different truck on the highway.

Any thoughts?