My ‘91 7A coupe with 270k miles emits a whine from the drive train at about 65 miles per hour. The driveshaft was swapped with no change in the noise and I don’t even know how to troubleshoot this. Please advise. Thank you.
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Is it related to gear or road speed?Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant -
Same here, around 230K, but reckon it is the rear diff, especially as I hear it more with the rear seats folded down.
Currently in process of replacing diff, prop and gearbox so it better be gone after that lot!Comment
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The drivetrain whine only occurs with foot on the throttle going about 60-70 miles per hour.
4th or 5th gear does not make a difference
If I take my foot off the throttle, the whine disappears
If the car is in neutral, the whine disappears
Thank you for all advice.Comment
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Sounds like a rear diff bearing,which has been my suspicion all along for my car.
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Here's a link to a simple mod I did to cut Gbx? whine...
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My rear diff didn't seem to make much noise until I installed polly bushings and mounts everywhere. After doing that, at highway speeds(55-75mph) I could notice an audible whine coming from behind me if I was at a steady speed. According to most, this is a common thing with these cars, and not much you can do about it. A friend had his rear diff rebuilt with no change.
If it's coming from farther up the drive line, I would suspect the trans may have a bearing failing.Comment
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