New differential…
Thread Starter
Intermediate
Joined: Jan 2023
Posts: 39
Likes: 5
New differential…
I dropped my C7 stingray off at the Chevrolet dealer. As I expected, differential is bad. They are asking 6700 plus tax for a new differential and install…..
I live in the Raleigh area of NC.
Anyone know of some place I could take it for a rebuild instead? Would that be much cheaper, or even worth the risk?
I live in the Raleigh area of NC.
Anyone know of some place I could take it for a rebuild instead? Would that be much cheaper, or even worth the risk?
Burning Brakes
Joined: Jun 2021
Posts: 803
Likes: 409
From: NC
I dropped my C7 stingray off at the Chevrolet dealer. As I expected, differential is bad. They are asking 6700 plus tax for a new differential and install…..
I live in the Raleigh area of NC.
Anyone know of some place I could take it for a rebuild instead? Would that be much cheaper, or even worth the risk?
I live in the Raleigh area of NC.
Anyone know of some place I could take it for a rebuild instead? Would that be much cheaper, or even worth the risk?
Team Owner
Joined: Sep 2000
Posts: 25,032
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
IIRC, it made the car feel a little livelier but actual 0-60 and 1/4 mile times remained unchanged. Without using drag radials, rear tires were quickly converted into smoke.
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Man, not a cheap repair by any means. Bumping up the rear ratio might be a good way to go if not much higher in price. Good luck with the repair.
Safety Car
Joined: May 2004
Posts: 4,628
Likes: 397
From: Madison Wi
Are you a DIY type of guy?
If it were me, I'd get a used unit from a low mile car getting parted out and install it myself for a few hundred bucks. I'd need to learn the eLSD bleed procedure, never had to deal with that one.
If it were me, I'd get a used unit from a low mile car getting parted out and install it myself for a few hundred bucks. I'd need to learn the eLSD bleed procedure, never had to deal with that one.
Thread Starter
Intermediate
Joined: Jan 2023
Posts: 39
Likes: 5
It’s a 2017, base automatic. I suspected rear diff because of noise location and the characteristic whine when on the accelerator lightly.
I am a DIY’er by nature, but this seems like a big job and time is an issue.
edit: about 63k miles
I am a DIY’er by nature, but this seems like a big job and time is an issue.
edit: about 63k miles
Last edited by sefrez; May 15, 2024 at 04:41 PM.
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Thread Starter
Intermediate
Joined: Jan 2023
Posts: 39
Likes: 5
I just got the car back yesterday after much delay in part deliveries. New axles had to be ordered as well. They were heavily worn with lots of play. It was relayed to me the mechanic said he had never seen a differential look like this and a previous owner must have abused it... I got the old differential back and it does look pretty rough. I will be disassembling it soon and may get some photos. What type of abuse to mangle the differential and axles? Doughnuts all day?
I can feel the difference now and in retrospect see all the play / looseness I had between transmission and wheels before.
I requested new upper control arms (84463636 & 84463637) that I had purchased from a gm parts supplier be installed in the process because the old would creak depending on weather conditions. This was done. However, creaking is worse with these. On the invoice, I don't see where an alignment was done. An alignment is mandatory when this type of work is done, no? I will check with them tomorrow to verify what was done. The parts looked genuine to me. I was wondering if there is a "break in" period. This practically new rear end has less than 50 miles probably. But I have my doubts and am usually right...
I can feel the difference now and in retrospect see all the play / looseness I had between transmission and wheels before.
I requested new upper control arms (84463636 & 84463637) that I had purchased from a gm parts supplier be installed in the process because the old would creak depending on weather conditions. This was done. However, creaking is worse with these. On the invoice, I don't see where an alignment was done. An alignment is mandatory when this type of work is done, no? I will check with them tomorrow to verify what was done. The parts looked genuine to me. I was wondering if there is a "break in" period. This practically new rear end has less than 50 miles probably. But I have my doubts and am usually right...
Tech Contributor
Joined: Oct 1999
Posts: 41,066
Likes: 9,834
From: Charlotte, NC (formerly Endicott, NY)
I just got the car back yesterday after much delay in part deliveries. New axles had to be ordered as well. They were heavily worn with lots of play. It was relayed to me the mechanic said he had never seen a differential look like this and a previous owner must have abused it... I got the old differential back and it does look pretty rough. I will be disassembling it soon and may get some photos. What type of abuse to mangle the differential and axles? Doughnuts all day?
I can feel the difference now and in retrospect see all the play / looseness I had between transmission and wheels before.
I requested new upper control arms (84463636 & 84463637) that I had purchased from a gm parts supplier be installed in the process because the old would creak depending on weather conditions. This was done. However, creaking is worse with these. On the invoice, I don't see where an alignment was done. An alignment is mandatory when this type of work is done, no? I will check with them tomorrow to verify what was done. The parts looked genuine to me. I was wondering if there is a "break in" period. This practically new rear end has less than 50 miles probably. But I have my doubts and am usually right...
I can feel the difference now and in retrospect see all the play / looseness I had between transmission and wheels before.
I requested new upper control arms (84463636 & 84463637) that I had purchased from a gm parts supplier be installed in the process because the old would creak depending on weather conditions. This was done. However, creaking is worse with these. On the invoice, I don't see where an alignment was done. An alignment is mandatory when this type of work is done, no? I will check with them tomorrow to verify what was done. The parts looked genuine to me. I was wondering if there is a "break in" period. This practically new rear end has less than 50 miles probably. But I have my doubts and am usually right...
Bill
Thread Starter
Intermediate
Joined: Jan 2023
Posts: 39
Likes: 5
So I have started noticing some reverse load / decel whine with this new diff. It’s faint, but there. Worse with decel on lower gears. It’s a new differential from GM… Internal setup issue from factory or bad install? Ugg