Curious if anyone has had similar issues with their AWD Chevy. Mine is a 2014 and has 105k miles. It's had a vibration at highway speeds since I bought it. The tires on it had some hop to them, like flat spots. So I replaced them with new 265/70R17 BFG AT KO2's. Vibration seemed to be better but not quite all the way resolved. I still have some at 40+mph. It's not shake the thing apart bad, but it's bad enough to annoy me after spending money on the tires. I've rotated the tires in hopes to feel it move and trace it down to one of the new tires but no luck. Always feel it in the seat, not in the steering wheel.
I swapped wheel/tires with a friend off his truck the other day and it seemed better, but again still a slight vibration around 50. He called it more of a wobble.
Yesterday I towed an empty 2-horse trailer. Guessing 3k pounds? The rear sagged a bit with it - maybe a couple inches. It still looked about level. Well that really made the vibration noticeable! 50-60mph was really bad. Heavy throttle might have been a little worse, but definitely still there on deceleration and coasting. Could push through and was much better above 60. The van sure is working a lot harder to keep it above 60 on these Vermont hills though!
When towing the vibration felt like rear initially but may have been more like under the seat. Still felt in seat bottom, steering wheel totally fine.
Any ideas?
Things I'm considering:
- road force balance of all tires
- pull driveshafts to check ujoints for binding
- have driveshafts checked for balance and straight
One of the techs (independent) that looked it over when I first bought it thought the front pinion bearing was loose. I took it to a Chevy dealer and they said no it was fine. That you had to isolate the bearing from the ring/pinion gear movement. The pinion seal is not leaking last I looked, so that makes me think that bearing is probably ok.
Curious what you all have run into with your vans.
I swapped wheel/tires with a friend off his truck the other day and it seemed better, but again still a slight vibration around 50. He called it more of a wobble.
Yesterday I towed an empty 2-horse trailer. Guessing 3k pounds? The rear sagged a bit with it - maybe a couple inches. It still looked about level. Well that really made the vibration noticeable! 50-60mph was really bad. Heavy throttle might have been a little worse, but definitely still there on deceleration and coasting. Could push through and was much better above 60. The van sure is working a lot harder to keep it above 60 on these Vermont hills though!
When towing the vibration felt like rear initially but may have been more like under the seat. Still felt in seat bottom, steering wheel totally fine.
Any ideas?
Things I'm considering:
- road force balance of all tires
- pull driveshafts to check ujoints for binding
- have driveshafts checked for balance and straight
One of the techs (independent) that looked it over when I first bought it thought the front pinion bearing was loose. I took it to a Chevy dealer and they said no it was fine. That you had to isolate the bearing from the ring/pinion gear movement. The pinion seal is not leaking last I looked, so that makes me think that bearing is probably ok.
Curious what you all have run into with your vans.
