I've read through all 4 pages that I could find when searching for "rear end noise" but decided to make a post about mine.
I have been trying to figure this out for the past 4-5 days now. Sound is a constant humming not a high pitch type of noise. It doesn't whine on acceleration or deceleration its constant after roughly 5 mph and is present up until 80 mph without changing pitch or loudness. I have replaced the differential fluid with the Mopar 90 SAE at 102,000 mi which was 1,000 miles ago the noise was present before the fluid change as well but not as noticeable because the van had a partition that I removed. I have taken a few trips trying to pinpoint the noise listening around the cargo floor. Seems like most of the noise is coming from the center of the floor not towards the sides I was kind of hoping its a wheel bearing. I have lifted the van one rear wheel at a time and tried listening to wheel bearing, carrier bearings, pinion bearing and drive shaft hanger bearings with a stethoscope not 100% sure I got a good listen to the hanger bearings because the are surrounded by rubber mount and all the metal parts are moving so can't really get a good place to press down the tip of the scope. I am only getting slight noise from the differential. But when I replaced the fluid everything looked fine. Open to any suggestions as well as recommendations for a good drive line shop around Fresno, CA. I think worst case scenario I am gonna try rebuilding the differential but want to make sure its done right. Also when I tried getting both wheels of the ground the ASR kicks in any way to disable that for testing purposes. I can't really give the van any throttle when on jack stands.
I have been trying to figure this out for the past 4-5 days now. Sound is a constant humming not a high pitch type of noise. It doesn't whine on acceleration or deceleration its constant after roughly 5 mph and is present up until 80 mph without changing pitch or loudness. I have replaced the differential fluid with the Mopar 90 SAE at 102,000 mi which was 1,000 miles ago the noise was present before the fluid change as well but not as noticeable because the van had a partition that I removed. I have taken a few trips trying to pinpoint the noise listening around the cargo floor. Seems like most of the noise is coming from the center of the floor not towards the sides I was kind of hoping its a wheel bearing. I have lifted the van one rear wheel at a time and tried listening to wheel bearing, carrier bearings, pinion bearing and drive shaft hanger bearings with a stethoscope not 100% sure I got a good listen to the hanger bearings because the are surrounded by rubber mount and all the metal parts are moving so can't really get a good place to press down the tip of the scope. I am only getting slight noise from the differential. But when I replaced the fluid everything looked fine. Open to any suggestions as well as recommendations for a good drive line shop around Fresno, CA. I think worst case scenario I am gonna try rebuilding the differential but want to make sure its done right. Also when I tried getting both wheels of the ground the ASR kicks in any way to disable that for testing purposes. I can't really give the van any throttle when on jack stands.
Last edited: