Heavy popping in left rear (U's? Half shafts?)

[mike100]

There is no way a u-joint needle roller is gonna be on the ground and your drivetrain still driveable. That would be so far gone that you wouldn't be able to drive 20mph without the worst noise you ever heard.

Maybe that's from someone else's car??? Probably need to take a quick peek under the vette.

[Bearly Flying]

Actually over the years, I have had several that have failed and spit out the needle bearings before showing any signs of failure.

I agree, a peek under the car is the best.

[scottfab]

Originally Posted by Bearly Flying

Actually over the years, I have had several that have failed and spit out the needle bearings before showing any signs of failure.

I agree, a peek under the car is the best.

Yup, me to. It wasn't on my Z but have seen depending on the position of the U joint missing needle bearings and very little noise. Time to stop driving it till you find the root cause.

[Schrade]

This hub nut is loose - VERY SLIGHTLY loose.

Is there a torque spec?

How does it get measured?



Looks like 42.80mm across the flats???

[Jagdpanzer]

Remove the cotter pin pull the locking hat off and you find 36 mm hex nut underneath. Set emergency brake and Torque to 200 lb ft

[batchman]

FSM calls for 168 lb ft if I recall. I find they sometimes loosen up so perhaps I should try 200...

Thanks!
- Jeff

[scottfab]

Originally Posted by batchman

FSM calls for 168 lb ft if I recall. I find they sometimes loosen up so perhaps I should try 200...

Thanks!
- Jeff

That number rings a bell. In about 2000 I retorqued my left rear and I still
had movement. Turned out to be the hub.

[Schrade]

I found nothing, and can't replicate. The rear axle(s) spun freely with the back in the air, forward and reverse. Shaft is tight, hub nut is tight.

I did find a bunch of acorns and small sticks in the driveway. Funny tho', I couldn't hear the crunch, but I sure felt in in the back left, rolling down the driveway engine off...

Kind of bothers me when problems go away by themselves...

[WARP TEN]

When I first got my 95 I encountered a clunking sound in the left rear when I turned into my driveway. My driveway is slightly up hill so the body was being torqued a bit as the one front wheel first hit. When it was down at Marc Haibeck's for some servicing he thought the sway bar bushing might be the culprit as they looked quite dried out. (18 year old 20k mile car living in So.Cal) He replaced them and retightened them but said the old ones turned out to look pretty good after all. But I went home and sure enough the noise was gone. We were both surprised but it hasn't reappeared in a year. --Bob

[WARP TEN]

Originally Posted by Schrade

I found nothing, and can't replicate. The rear axle(s) spun freely with the back in the air, forward and reverse. Shaft is tight, hub nut is tight.

I did find a bunch of acorns and small sticks in the driveway. Funny tho', I couldn't hear the crunch, but I sure felt in in the back left, rolling down the driveway engine off...

Kind of bothers me when problems go away by themselves...

Hey Schrade---Did you ever find what was causing the noise or did it just go away? --Bob