Sharp clicking from passenger rear half shaft area.

[Ls7/Ls9 Test Engineer]

Hello all,
The root cause was found to be a loose axle nut on the passenger side. Bought a new nut and re torqued +10% and the issue is now gone. Thanks to everyone for all of the help. It’s greatly appreciated.

[Paul Workman]

Originally Posted by Ls7/Ls9 Test Engineer

Hello all,
The root cause was found to be a loose axle nut on the passenger side. Bought a new nut and re torqued +10% and the issue is now gone. Thanks to everyone for all of the help. It’s greatly appreciated.

Thanks for getting back to us on the fix. GOOD TO KNOW.

And, Cliff, Marc's tip sounds like a good one for the SOLUTIONS collection, no?

[Dynomite]

Originally Posted by Paul Workman

Cliff, Marc's tip sounds like a good one for the SOLUTIONS collection, no?

Yes......Done
Always keep me posted
See.......ZR-1 Drive Train (Drive Shafts).

Sharp Clicking Rear Axle

Marc has over 40 Posts on this Forum many of which are -Solutions-

That is not counting Solutions he has text me

[Ls7/Ls9 Test Engineer]

Just so everyone knows, The noise that was heard was the EXACT same noise you hear when you crack a lug nut loose. That really sharp creak sound happened each and every time I changed from forward to reverse.
Not to sure whether it was the splines moving in the hub, or the friction slip on the back seating area of the big nut, but after being tightened, the noise disappeared 100%.

[billschroeder5842]

Originally Posted by Ls7/Ls9 Test Engineer

Hello all,
The root cause was found to be a loose axle nut on the passenger side. Bought a new nut and re torqued +10% and the issue is now gone. Thanks to everyone for all of the help. It’s greatly appreciated.

Hey all- I'm going to get after this one tomorrow as I also have a sharp, click on the driver side.

I'm kind of a geek and do consult the FSM prior to project while I watch college football and read the manual. (Roll Tide and Geaux Tigers!)

For the life of me I CAN'T find the section of the FSM that covers this procedure?

Section 4B is about the rear axle, but no mention of the axle nut?

[Dynomite]

You can do exactly as Marc suggests or go a bit further........Left Click on the Link Below. (Both involve tightening the Axle Nut)

Originally Posted by Marc Haibeck

Is it a crunch sound that is most likely to occur when going from reverse to forward?

A common cause is loose rear spindles in the rear wheel bearings. The splines are a loose fit. The clamping action from the nut keeps the spindle from rocking in the bearing splines. It's easy to eliminate this possibility. Just remove the rear tires and tighten the nuts. The torque specification is 164 lb. ft. I like to tighten them about 10% tighter to 180 lb. ft.

This Link has some Photos
Clicking from rear under initial load

[billschroeder5842]

Thanks Dynomite- this is exactly what I need to do.

I must have missed it.... what size socket do I need for the nut?

Looks like I'll remove the nut, repack with axle grease and torque to 190.

Thanks!

[Dynomite]

36mm Axle Nut.....If you want to go a bit further......

Post 240 - New Rear Wheel Bearings and Half Shaft U-Joints

All tested recently on a 4,000 mile road trip

[billschroeder5842]

Thanks! You rock!

[billschroeder5842]

I did the "repair" today, removing the nuts "trying" to put a bit of grease in the spindle (I used a hypodermic syringe) but the tolerances would have nothing with it.

I used the torque wrench to get the nut to 190lb.

I took it for a ride and did not hear the sharp "snap" as in the past. I did hear a very, very soft *pop* occasionally as I transitioned from forward to back. I admit I was "looking" for a sound so I could have imagined normal car noises. If the radio was on at any volume I probably would not notice anything-- again I was listening hard.

So, would you leave things alone for go back in and put an additional 10lbs on the nut?