Rear end "whir" on C5
Thread Starter
7th Gear
Joined: Jun 2013
Posts: 7
Likes: 0
Rear end "whir" on C5
Just got back from a 1500 mile road trip. Car ran great, only 63K miles on it. About 400 miles from home the instrument panel went haywire and the DIC relayed "reduced engine power" and "service tire air monitoring system" among other things. The engine did not exhibit any reduced power. All the gauges went to red except the Volts. The stereo stopped working and the windows wouldn't work. I pulled over, shut the car off and restarted it no problem. All good again. A ton of codes in the DIC but all 'H' codes. The concern didn't come until today when I noticed a weird dragging sound after 40mph, independent of the revs. Nothing's dragging or rubbing the tires. No smells or squeals. No performance impact I can tell. Power's good, suspension's good, tranny an brakes good too. Is there something notorious with the rear end or gears? This drone is annoying as hell but I don't want to destroy something probably expensive. Any ideas? Was the computer issue related maybe?
Thanks for any input and knowledge!
Thanks for any input and knowledge!
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
If you turn the car off and then pull the codes most will show as H. Record what you found and let us know what they were and then clear them and see what comes back.
Sounds like it could have been a temporary low voltage issue or a serial bus corruption.
Will have to ponder your dragging issue. Check your fluid levels in the Diff and Tranny as a first step.
Auto or 6 speed?
Could be two different issues entirely.
Sounds like it could have been a temporary low voltage issue or a serial bus corruption.
Will have to ponder your dragging issue. Check your fluid levels in the Diff and Tranny as a first step.
Auto or 6 speed?
Could be two different issues entirely.
Thread Starter
7th Gear
Joined: Jun 2013
Posts: 7
Likes: 0
Dadaroo, I cleared the codes already but remember most of them were cpu and both door command module communication. I think the computer got warm sitting in bumper to bumper traffic and driving 13 hours. It happened once before and was traced to low voltage from the battery. I replaced the battery recently so I dunno.
I got as under the car as I could to see if I hit something or am dragging a carcass. No smell of rubber or plastic. Fender wells check out even though that's exactly what it sounds like. No drag. I'll try to reach the diff but without a lift it'll be a chore. I'm afraid to shred something valuable or cause further damage but I have no choice it's my only car!
To answer your question its a six speed.
I got as under the car as I could to see if I hit something or am dragging a carcass. No smell of rubber or plastic. Fender wells check out even though that's exactly what it sounds like. No drag. I'll try to reach the diff but without a lift it'll be a chore. I'm afraid to shred something valuable or cause further damage but I have no choice it's my only car!
To answer your question its a six speed.
Advanced
Joined: Feb 2008
Posts: 77
Likes: 1
From: Winter Haven Florida
Does the noise get worse when you turn? If yes, it could be a bad wheel bearing. I just had one go bad, the push/pull test didn't reveal any play but when I took the bearing off it's very rough when you spin it. It sounded like a roaring noise coming from the rear in my case.
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Thread Starter
7th Gear
Joined: Jun 2013
Posts: 7
Likes: 0
Jac, it stays constant in a straight line or turning. I usually hear bearings chirp or squeak, but I'll check it tomorrow. Hopefully I can get the car on a lift.
Martysauto, thanks man I'll have it tightened regardless.
Martysauto, thanks man I'll have it tightened regardless.