Rear frame is different heights

[austinbaileyps2]

I am chasing a bumpy feeling that feels like an imbalanced wheel when driving around 65 and up. I have done several things attempting to fix the problem including replacing the wheels and tires, upgrading shocks, replacing the rear sway bar and end links, all to no avail. I have brought it back to the tire shop three times to rebalance the tires using their road force machine and they haven't been able to get rid of the feeling. They are telling me the tires are balancing out and they mentioned that my rear sway bar end links were way off, which confused me because I installed it. I got under it tonight and realized the sway bar is level, but the links are different lengths. I measured the frame to the ground where the links attach and got that there is about a 3/4" difference in the height of the Frame when comparing both sides. Is this normal and could 3/4" be something to worry about?

 

[austinbaileyps2]

Also it's important to note that I purchased the vehicle with 35" tires on it and the vibration feeling. Was told by a shop that one of the rims was oblong so I just accepted it and dealt with it.

 

[rzr6-4]

Could be a couple of things. The lean could be from you preloading the sway bar and needing adjustment, and it's also not uncommon for vehicles to start to sag on the driver's side over time. Miles and miles, year after year with a couple hundred more lbs in the driver's seat than the unloaded passenger seat. That said, if you are talking about your 2020 that would be a little odd. Vehicles that you see sag are usually 15 years old at least I would say. Double check your end links and go from there.

Regardless of the source of the lean, that shouldn't be causing a vibration. Even if they balance on their machine I would be highly suspect of an oblong wheel. Is it front or rear that you can feel the shake? If it's the rear, rotate your tires to the front and see if you can feel a shake in the steering as well. If so, it's the wheel. If not, it could be suspension or something else.

 

[Daw14]

Fuel tanks on the driver side,they are usually a bit lower.

 

[austinbaileyps2]

Could be a couple of things. The lean could be from you preloading the sway bar and needing adjustment, and it's also not uncommon for vehicles to start to sag on the driver's side over time. Miles and miles, year after year with a couple hundred more lbs in the driver's seat than the unloaded passenger seat. That said, if you are talking about your 2020 that would be a little odd. Vehicles that you see sag are usually 15 years old at least I would say. Double check your end links and go from there.

Regardless of the source of the lean, that shouldn't be causing a vibration. Even if they balance on their machine I would be highly suspect of an oblong wheel. Is it front or rear that you can feel the shake? If it's the rear, rotate your tires to the front and see if you can feel a shake in the steering as well. If so, it's the wheel. If not, it could be suspension or something else.

I adjusted the sway bar, still have the issue. Even called Hellwig to confirm.

To me it feels like the whole body of the truck. I always assumed it was from the wheel that the first shop told me was oblong. After Ive bought a fresh set of wheels and tires, three road force balance rechecks, Im less inclined to believe its the wheels/tires.

Im worried the truck has frame damage from an unreported accident, but I don't know if 3/4"would even matter.

 

[austinbaileyps2]

Fuel tanks on the driver side,they are usually a bit lower.

That's a good point but I was low on gas when I measured so I would think it should be even or higher that the passenger side? Unless maybe the spring on that side is worn out?

 

[jws123]

What size tires are on it now? i know you said it came with 35's I have nver seen a smooth balanced set of 35 inch tires not even with my jeeps always has a shake above 65 hence why its for off road and local use not a cruiser. Another thing to look at are your drive shaft angles since your truck is prob lifted a bit.

 

[Wild one]

There isn't a Ram built that's level. According to a Ram engineer on another forum years ago,they're built to be taller on the pass side to offset the crown of the road. The myth about it being due to the fuel tank is exactly that a myth. The fuel tank sits inside the frame and is almost in the center of the truck,and has no effect on how the truck sits whether it's full or empty,plus the engine and transmission are offset to the pass side of the truck a couple inches,take a look at the footwells,the drivers side footwell is noticably wider then the passenger side footwell,which would negate any pre-concieved myth about the fuel tank being the reason.
If you have a vibration and you've ruled out tires it's got to be somewhere in the driveline from bad pinion angles to wore out u-joints / bad center bearing if the truck has a 2 piece driveshaft / bad transmission or motor mounts etc.
Another possibility is a bent axle or bent diff housing