Differential noise?
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Cruising
Joined: Nov 2016
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Differential noise?
I did a brief search here to see if differential noise has been a hot topic in the past. Didn’t see anything that resembled the problem I have. So, here are the basics: 2000 C5, manual shift with 3:73 gears. 135,000 miles. Two owner car in pristine condition with C6 wheels with new Michelin Pilot Sport tires. That’s the way I bought it in April, 2017. Car always had a whine that I attributed to “tire noise”. Never thought much of it. Lately the noise has become more pronounced but I have also been driving the vehicle deeper into the colder months and still figured the tires were the issue. Not so sure now. Transmission definitely good and shifts through the gears without any noise. Below 25 mph the noise not really noticeable but above that it gets pretty loud. No leaks anywhere. Wheels are spotless. Garage kept. If I had to guess now I would say rearend is low on fluid but noise matches car speed regardless if under acceleration or not. Coasting down hill in neutral you have noise. You guys are the experts. What do you think? Thanks ahead of time for any advice.
Last edited by Boatcrazy; Nov 23, 2018 at 11:04 PM.
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Jack one rear wheel off the ground and grab the tire at the 12 - 6 O Clock position and then the 9 & 3 O Clock position and push /pull on the tire. A good wheel hub will have little to no SLOP (free play) at the hub bearing.
If you have visual slop, that bearing is most likely worn/bad.
You can only test the front wheels at the 12 - 6 O clock positions. I would test all four wheel hubs.
Bill
If you have visual slop, that bearing is most likely worn/bad.
You can only test the front wheels at the 12 - 6 O clock positions. I would test all four wheel hubs.
Bill
Last edited by Bill Curlee; Nov 26, 2018 at 01:54 PM.
