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Wedge TR8 scraping noise from the passenger side rear

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tdskip

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Hi guys - after several years of faithful service on fast road rally events the TR8 has developed a scraping noise from the passenger side rear axle area. It is rotation based, but is not the wheel bearing. It will stop making the noise in neutral, comes back when power is transferred. Her differential has the right oil level in her and the right type of oil.

The noise requires the drive train to be engaged, if you put the clutch in it goes away.

The noise is louder in 2nd gear than 3rd or 4th. The noise is coming from behind the seats / rear of the car, I would have expected gearbox noise to be under the front/middle section. But odd that 2nd gear is so much louder. A diff wouldn't wear in just one gear, would it?

Any ideas?

Thanks
 
Universals?
 
Hi Elliot. Would a u-joint be more/less noisy in a given gear?

How is your 6 BTW, just driving her or any projects?
 
U joints seem to be noisier under power .IIRC?
 
Hi Don, agree but why louder in 2nd gear rather than 3rd then? Wouldn't for same power the joint make same noise?
 
Stock TR8 driveshafts don't have universals. Any chance the shifter quadrant is rubbing on the driveshaft? Is it possible that the rear backing plates are rubbing against the drums? How about e-brake cable rubbing on the driveshaft? Take a look at the driveshaft first and see if there is an area where the paint has rubbed away.
 
Dang, Forgot that as I replaced mine long ago
 
OK guys - spend some more time driving and I got the initial description wrong. It is from the rear center. Present in all gears, more so when accelerating, not just 2nd.

Pretty sure it is the differential at this point.
 
Hi Randy - I'm 99% sure it is the differential. Sorry.

Guys - are we thinking most likely UKC978?

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I don't think you are going to know until it comes apart. I would think the ones at the end of the spider gears could be culprits as well.
 
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