Dealer blaming rear dif noise on lowering of car.
I have this grinding noise only when pulling a u-turn and accelerating fairly hard. The first time I took it in they couldn't reproduce it and couldn't find any bulletins themselves. They actually told me they couldn't change out the fluid because the exhaust was in the way. I have an after market cat-back exhaust with clamps at the axle back. I knew there was a TSP so I found it and took it back. I had to explain that my exhaust would be easier to deal with than stock. They still couldn't reproduce but I had my dealer do the fluid change and additive per tsp. They added a note about my car being lowered. Now I have called again because the noise is still there. The service department is telling me that because it is lowered they most likely won't be able to help me.:mad0260:
So will lowering cause any problems with the differential? CV joint?:iono: This actually started before I lowered it but they have no record of me telling them. I told them but at that point It had only happened 2 times and I wasn't sure exactly what the noise was associated with. They service guy told me to figure out exactly when it happened and bring it back.:help: |
Find a new dealer. Lowering wouldn't cause that.
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I am having same issue. I did take it to the dealer last fall. I made over 100 laps around the lot and couldnt get it to reproduce, and this was before I lowered it. It seems like its getting worse now and have an appt for next week. And I agree, lowering has no effect in the rear end.Nor the shifter, CAI or painted engine cover that I installed. I will post up when I get her back from the dealer.
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Possi diffs make some noise guys. Are you sure what you are hearing isn't your diff doing its job?
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I did find this on the forum.
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Very similar to the TSB for the corvette diff. Just the sound of a properly operating clutch type posi trying to make both tires spin at the same rpm while your steering wheel is forcing them to do the opposite.
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They did he same sh*t to me with my truck. I put a 6" lift on it and they blamed the front driveshaft noise on the lift. They canceled my drivetrain warranty! I had them change the fluid and the noise went away. They still won't say they will honor future drivetrain issues.
Know your dealer! That's the best advise. |
Also its like Robert91 said. If you are doing a U turn and mashing the loud pedal the rear end is doing what its supposed to. Its slipping on the "inside" axle ( depending on what direction your steering wheel is) so some thing doesnt break. Probably shouldnt do that with this set up, you might end up with a "one tire fryer" !?
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Did you put urethane diff bushings in? With harder differential bushings the rear end will make more noise when turning. Mine howls like a banshee on turns since I put the Pedders street bushings in mine. I lowered it first with Xa coilovers and it didn't make noise until I added the bushings later. Changing the fluid didn't help. Next, I'm trying another fluid change, but add more additive to see if that helps.
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Thanks:drinking: Quote:
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Thread Jacking myself. Mod friendly Dealers?
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Anyone know a mod friendly dealer in the Tampa Bay Area- Pasco, Pinellas, Hilsborough? |
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Jeff Morris, Chevrolet Customer Service |
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