Im driving a Camaro 98 v6 3800 and there is a noise coming from the rear of the car. It goes up and down with the speed and sounds like the brakes are rubbing but they have all been replaced along with the drums. I have had the car for 2 years and it has always made a little noise but seems louder now. It has a slight tone change every tire rotation almost like when i had a bent axle but that only made a noise when the brakes where applied.

 

hey my car did that too. Go and touch ur cars break disk see if there is any metal shavings or if they feel rough?

 

When carrier bearing are failing they will make a noise that changes with road speed. I had a rear end that took two years to finally blow but made plenty of noises for two years before it finally went.

 

I had that problem with a Nissan,and it was the tires.Hope this helps.

 

Z28LT1_Just_Nasty, Is there something to change or repair if that is the case.

 

The only thing that can repair bad bearings is new ones. Pull off the differential cover and you will see the carrier. Remove the small 8mm bolt that holds in the pin that holds in the top and bottom spider gears. Once the pin is removed, push in your axles towards the center of the rear and remove the c clips that hold in the axles. Remove the axles. Then remove the two caps that hold in the carrier. They are on either side of the carrier. Remember to keep the shims from the left and right side apart. If you are using the same gear set you can get the gears into correct contact pattern without measuring everything. Remove the carrier out of the rear. Then press off the carrier bearings and press on new ones. Make sure to replace the races with them. Bearings are made in matched sets to their races. Now place the shims you took from the left and put them behind the left race, then take the shims you had on the right and put them behind the right race. Reassemble everything and make sure to replace your fluid, if you have posi don't forget to add limited slip additive.

Really it's not all that difficult if you are just replacing bearings, make sure to keep your shims apart so that you will have the correct backlash when putting the rear end back together. If you are replacing the gear set then you must remeasure everything and set the shims to correct backlash.