Chevy dealer is saying the rear differential is bad in my Tahoe. 200,000 highway miles. Seams to drive fine...when I let off the gas it makes a definitive noise at 35 mph as it decelerates.
How do they know its the rear differential?....They are telling me you cannot buy a new one? To rebuild is $3500?
What about this?
http://www.gmpartsdirect.com/chevrol...e=differential
Any mechanics in Chicago willing to take a look?
Thanks! tom
7736390945

 

WOW that sounds pretty high.
Differential Repair is not for the inexperienced mechanic. Tried to do a few, and never got good lasting results. I'd drop by some other Shops and get a quote from them.

 

I just had my rear diff rebuilt earlier this year and spent right about $3500. I had them use all OEM GM parts for the rebuild. My carrier bearings were bad, and they would make a scrubbing noise which was relevant to vehicle speed, and you can hear the gear whining as well. Im surprised the bearings lasted that long, b/c the scrubbing noise I first heard when the car was brand new, I was super ignorant then and didn't think there was anything wrong. I had maybe ~206K at the time of the rebuild.

The transmission shop I brought it to, raised up the vehicle on a lift and ran the car in drive to let me hear the noise while standing under the car, and the noise was much more pronounced and louder from underneath vs being inside the cabin.

I didn't trust the dealer to do a good job, I felt like they are just out to get your money and will rush the job, and I lucked out that there was a transmission shop near me that from researching online had an excellent reputation for their work and especially their customer service. Hopefully you may have a transmission shop near you that does good work.

That link you posted I think is just the carrier assy. alone. While its opened up, might as well place the other bearings and the ring & pinion etc.

Good luck!

what does the noise sound like in your Tahoe OP?

 

Wow, $3500 seems really high to me.

I killed the rear axle on my '01 Suburban in the middle of nowhere in South Dakota. Was on vacation with my family towing a trailer that was a tad too heavy for a half-ton truck. Was towed to a shop in Mitchell, SD. They ordered a rebuilt rear end and it had to be shipped from Minneapolis. Between the labor and transit time, we got to spend four lovely days in Mitchell. And even knowing they had me over a barrel, my bill was only $2200.

 

the pinion bearings are under load during accell and decel...that is how they know. pushes out under load and load one bearing, pushes in on decel and loads the other. the bad bearings can put crud in all the bearings.

whoever does it...make sure they use oem parts. I have seen new aftermarket crown and pinons have xs runout from new...this translates to a noisy rear end.

 

I'm at just under 50k miles on my '13 Hoe. Would it be wise to have the rear diff oil changed as preventative maintenance at this time?

 

I do a full change. every three years...


Transmission Fluid W/filter
Both Differentials
Transfer Case
Chassis Lube

 

All the driveline fluid need to be changed every 50 000 miles, front, rear and tcase fluids

 

When I first glanced at this, I somehow assumed that include the wife.

 

Not having one, is what allows me to keep my ride in such good shape