Squeak / Chirp in Rear Axle Pinion (Differential)
Some background ... I took the truck into a shop and had a bad set of pinion bearings replaced. The shop did not get the preload right (too loose), and I had a decel noise in the rear end. The preload was tightened, and the noise went away.
After about a week (and after a towing trip), a new noise showed up. This time, it's a squeak / chirping sound. At first, I swore it was the brakes; however, after jacking the rear axle up and running the truck in drive, the sound was pinpointed at the rear axle pinion area.
The noise only occurs on decel after the pumpkin has warmed. I can let off the pedal and the squeak / chirping sound will start at a frequency thats relavent to the drive speed.
I suspected the drive shaft carrier bearing, but it was quiet. I also suspected the u-joints (a typical source of squeaks), but I replaced all of my u-joints with Spicer's (5-801x's) less than 10k miles ago.
Has anyone else had an experience with this sort of noise out of a 10.5" Sterling (or any other diff)? Should I replace the rear joint "again" or tighten the preload just a tad?
Last edited by 98SurplusExpy; 02-18-2012 at 06:27 PM.