4 in suspension lift running 33x12.50x15s. When I bought Jeep it had a slight vibration between 60-65mph that you felt in the steering wheel slightly. Cupped tire on front passenger side was found to be the culprit. Ended up moving that tire to the rear as my spare was cupped as well. Moving it to rear reduced steering wheel vibration but obviously moved a slight vibration to the rear.
I ended up finding a Dana 44 with disc brakes and opted to grab it before replacing the tires. Replaced front and rear rotors, calipers, and shocks. Had Dana 44 installed, SYE, Adams driveshaft and adjustable control arms in the rear and had transfer case lifted back up.
The shop found a busted tranny mount and replaced this as well.
Leaving the shop I had what I described as a pulsating vibration very faintly felt in the seat. At 45-50mph it would last for 2-3 seconds and reoccur every 5 seconds. No other vibrations at lower speeds or highway speeds.
The pinion angle was found to not be set correctly and they readjusted. I Left the shop and the vibration was less frequent but now at 70mph there was a vibration that is constant. So, I decided that knowing my tires were in need of replacement I’d bite the bullet and replace them. Was hoping to run the other tires for awhile even though they had some issues.
Now, Brand new tires, and the issue is still there.
There is no death wobble, no weird noises, Jeep rides really smooth and maybe I’m being anal about it but I know what I’m feeling in the seat that was never there before.
For what it’s worth, my shifter used to rock back and forth when hitting a bump, the 4wheel lever would rattle at low speeds and it was occasionally hard to shift, since the transfer case was lifted and the mount replaced everything is tight, doesn’t rattle, and Jeep has never shifted so smooth.
I’m at a loss. The shop has been more than helpful but something still isn’t quite right.
I still believe it’s in the driveshaft angle personally. None of this was an issue with the 35 installed.
In summary, 40-45 mph there’s a 2-3 second faint vibration followed by 5-10 seconds of no vibration. 70mph on the dot vibration is constant and feels like it’s all in the rear of the Jeep.
I ended up finding a Dana 44 with disc brakes and opted to grab it before replacing the tires. Replaced front and rear rotors, calipers, and shocks. Had Dana 44 installed, SYE, Adams driveshaft and adjustable control arms in the rear and had transfer case lifted back up.
The shop found a busted tranny mount and replaced this as well.
Leaving the shop I had what I described as a pulsating vibration very faintly felt in the seat. At 45-50mph it would last for 2-3 seconds and reoccur every 5 seconds. No other vibrations at lower speeds or highway speeds.
The pinion angle was found to not be set correctly and they readjusted. I Left the shop and the vibration was less frequent but now at 70mph there was a vibration that is constant. So, I decided that knowing my tires were in need of replacement I’d bite the bullet and replace them. Was hoping to run the other tires for awhile even though they had some issues.
Now, Brand new tires, and the issue is still there.
There is no death wobble, no weird noises, Jeep rides really smooth and maybe I’m being anal about it but I know what I’m feeling in the seat that was never there before.
For what it’s worth, my shifter used to rock back and forth when hitting a bump, the 4wheel lever would rattle at low speeds and it was occasionally hard to shift, since the transfer case was lifted and the mount replaced everything is tight, doesn’t rattle, and Jeep has never shifted so smooth.
I’m at a loss. The shop has been more than helpful but something still isn’t quite right.
I still believe it’s in the driveshaft angle personally. None of this was an issue with the 35 installed.
In summary, 40-45 mph there’s a 2-3 second faint vibration followed by 5-10 seconds of no vibration. 70mph on the dot vibration is constant and feels like it’s all in the rear of the Jeep.
