I have a 2016 Ram 1500 Sport CC 4x4, while I know this is not a 5th gen, this vibration issue spans back through the previous models and this is the latest updated thread I could find on the subject.
After researching for quite a while, I haven't found a singe thread that encompasses all the symptoms and attempted resolutions (that I have seen so far), so I wanted to add that here.
Symptoms:
1. Vibration that seems to be coming from the rear of the truck.
2. Vibration is felt in the seats, floor and console, but is not felt in the steering wheel.
3. The vibration comes and goes at highway speeds seeming to be more prevalent in the upper 60s to 75mph.
4. The vibration seems to be worse when turning, like in longer sweeping turns on the interstate or coming on to an exit ramp.
Attempted Resolutions:
1. Multiple tire balancing efforts - (may help, may not) Many argue this depends on the knowledge of the tech performing the balancing.
2. Multiple Road Force balancing efforts - (may help, may not) Many argue this depends on the knowledge of the tech performing the road force balancing.
3. Rotate tires - makes no difference.
4. Replace tires - may help, may not.
5. Replace the shocks - may help, may not.
6. Balance or replace the drive shaft - may help, may not.
7. Replace the coil springs - makes no difference.
8. Replace axle shafts - may help, may not.
9. Verify trans yolk bolts are tight - if they are loose, tightening would help, but this doesn't seem to be the overall issue.
10. Install OEM Rebel wheels with standard Rebel tire size - did not make a difference.
Things I tried before coming to the forums and realizing this has been an ongoing issue.
1. rotated tires to see if the vibration moved from the rear to the front - it did not.
2. replaced all 4 shocks with Bilstein B6 4600 shocks - made no difference.
My conclusions:
1. If it is a tire balancing/road force balancing issue, it doesn't seem like the vibration would change/get worse when turning at highway speeds.
2. If rotating the tires does not change where the vibration is coming from, and is not felt in the steering wheel, this would seem to rule out tires/wheels.
3. If the vibration changes/get worse when turning at highway speeds, this seems like it would point to some sort of driveline issue.
4. The biggest glaring fact to me so far is that the Rebel does NOT have this vibration issue.
Remaining questions:
1. If the Rebel does not have this issue , other than the air suspension, wheel/tire size and softer rear stabilizer bar, what are the differences that might cause this vibration issue for the non-Rebel models? Or is the air suspension and/or the softer rear stabilizer bar the reason it does not have the vibration?
2. Wind buffeting - if this is the cause, I would think the Rebel would have the same issue.