diff noise while coasting??

[BBVX]

Lifted, and big tires, neither of which was my problem.

My rear axle was out of alignment, from going offroad, alot. There are (for all intents and purposes) 3 rods that hold your rear axle in place. 2 go front to back and 1 goes side to side, well I bent them ALL ! This was causing rear driveshaft vibration.

We took them off, straightened them with a jack, and have been good ever since. I noticed a similar noise recently, faint but growing, but I greased all the fittings on the rear driveshaft and it went away.

Brian

[VR4-Quest]

Well wait, you mentioned the dealer getting you a new rear axle, what does that have to do with the bent rods, or did they lead to the failure of the rear axle?
Guess Im trying to figure out if this is a rear axle or rear axle placement issues, and if its amplified by lifting the VX (the rear locating rod angle does change with a lift, and so would the "placement" of the rear axle), not just from possible off-road abuse.
As it sounds like everyone that lifts the VX has this vibration issue, and I would like to have the solution to fixing it.

[BBVX]

If I recall correctly, we thought the rear diff was bad shortly after the front diff was replaced. Sure I was beating on them more than your normal driver but they would still be under warranty. They ordered me a new rear diff and it took several weeks to come in. During this time, the service department got a new manager, so when I took it in for the diff replacement, they looked closer and diagnosed it as bent stabilizer and lateral rods, which weren't covered under warranty.

They wanted almost $1200 for the three bars and I said no thanks. We straightened mine and it's been fine since. Even if it didn't fix the problem, I would have bought a stronger set of pre-bent bars from stinkyfab for about half the price.



http://www.stinkyfab.com/index2.html

In hindsight, the driveshaft issue made more sense because the vibration would have been transferred into the T-case, making me hear the noise much farther forward in the vehicle.

Although lifting the vehicle by adding taller springs does slightly move the axle to one side, I don't think it would be enough to cause a vibration (noise) as bad as mine, if any at all. Maybe it's time for a new thread with a "lift vs. noise" poll?

Brian