Slow Clicking Fast Clicking In Rear

[ZyaL8er]

I have a 70z i built 2 years ago not 1 problem i couldnt pin point & fix . Until now. when driving this clicking noise is coming from rear of my z. now this clicking goes in sync the faster i go fast clicking slowing down slow down clicking until i stop at a red light.take off and away we go again with that fricking clicking its driving me crazy . ANYONE experience this before I need some insight on this 1. :sick:

[RIP260Z]

A stone in your tire....

[Virto]

...yhea, it sounds odd, but from experience, it's probably a piece of gravel in the treads.

[Mr Camouflage]

Yeah I had the same problem with a different car (was a Aussie turbo all wheel drive Laser TX-3 - basically a re-modeled Mazda 323 4wd turbo).

Clicking was coming from the front left side of the car. It was dependant on car speed, not engine revs. I thought it was a cv joint in the driveshaft, after wasting money getting it rebuilt I discovered it was a missing tooth on either the diff crown wheel or the output shaft of the gearbox (front diff was built onto the end of the gearbox).

How I discovered it was that, was I got pissed off after spending the time replacing the driveshaft, and after the test drive it was still making the noise, and dumped the clutch in 1st gear, and bang, stripped half the teeth off the output shaft and about 10 teeth off the crown wheel in various positions around the wheel. took the gearbox/diff to get rebuilt , was going to cost $3K, so I said forget it and collected the pieces. It was a mess. got another second hand one for $850.

So worst case scenario, you have a missing tooth in your diff.

How can you check for it? I guess if you jack one wheel off the ground, (use an axel stand, car in neutral). Get a helper to put some resistance on the driveshaft (from the gearbox to the diff), and turn the wheel slowly and you can feel the diff jump.

but yeah, check the tyres for stones/nails, and the uni joints in the half shafts for play. also check the hub flanges for play. Might be a wheel bearing problem too.