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
Reply With Quote