Need Help Diagnosing This Sound

[jcruz]

Looking for help diagnosing the sound heard in the video.

The video is of me moving the car back and forth in my garage next to the rear wheel on the driver side. 1992.

At this point the car is sidelined and I don't feel it's safe to drive.

Any help would be appreciated!

John

https://vimeo.com/254120397

[S.hafsmo]

On mine the mount for the brake hose had gotten bent slightly, causing the hose to touch the wheel. At least it's easy to check.

[TX '90 ZR1]

I'm not an expert at this, but my first thought was a u-joint binding.
I'd get the rear up in the air, remove the tires and see if you can duplicate the sound turning the assembly by hand.
Could be numerous things, but I think with the tires off you should be able to track it down.
Let us know what you find out. :confused:

[jcruz]

I'll do the two checks above.

Strangely enough, when I put a different set of rims/tires on, the sound & feeling isn't as pronounced. Still there, just not as bad.

Thanks!

[lfalzarano]

Put it on a lift in neutral and manually rotate the tire. Mark the tire at 12 o’clock when you hear the noise. It might be in more than one spot on the rotation. Once the marked spots can duplicate the noise, use a stethoscope to pinpoint the source of the noise from the rim to the differential. Good luck. [emoji481]


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[Ronstar]

My money is on u joint

[jcruz]

My money is on u joint

Noted. U joint is primary suspect #1. Will do more testing tomorrow!

[Ccmano]

My money is on u joint

I tend to agree, also check the parking brake assembly.
H
:cheers:

[Young1]

U joint or wheel bearing. Crunchy Munchy


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[jcruz]

So, I got the car up on stands this morning, ready to manually turn the wheel and see what was going on. The first thing I notice is that the driver rear wheel is loose! OMG, like really loose :eek: I could rock it back and forth and 4 lugs came off by hand.

Took the wheel off and turned by hand...no noise. So, I guess the sound was due to the loose wheel?

I'm feeling very lucky! I guess when I swapped the wheels last time I must have missed tightening these lugs down (I was in a bit of a hurry). Oh man.

Thanks all for the feeback

John

[lfalzarano]

You are very lucky man. I screwed up once on my Triumph TR4 in college. It took out part of the rear fender, 3 inch drop to the roadway was frightening at speed and of course the 180 degree spin was a nice touch to my date... Thankfully, we had quite a few that evening (legal back then), so we laughed it off.


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[jcruz]

You are very lucky man. I screwed up once on my Triumph TR4 in college. It took out part of the rear fender, 3 inch drop to the roadway was frightening at speed and of course the 180 degree spin was a nice touch to my date... Thankfully, we had quite a few that evening (legal back then), so we laughed it off.


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Yeah, could have been a disaster

[Ccmano]

It’s always the simple things that come back to bite us. Glad you found it.
H
:cheers:

[billschroeder5842]

I'm feeling very lucky!

It is good to be good, but way better to be lucky!

Cheap fix-well done!

[TX '90 ZR1]

WOW!!
Glad you caught it in time.
Every time I have wheels off of anything, when I re-install I go around TWICE with a torque wrench. Just to make sure after the first drive I check them again with the torque wrench.
I know some poo-poo the torque wrench. I learned my lesson on a '69 Mach 1. Lost a tire because I thought I knew when the lug nuts were tight enough.
Also, not a bad idea to get the wrench calibrated occasionally.

[jcruz]

WOW!!
Glad you caught it in time.
Every time I have wheels off of anything, when I re-install I go around TWICE with a torque wrench. Just to make sure after the first drive I check them again with the torque wrench.
I know some poo-poo the torque wrench. I learned my lesson on a '69 Mach 1. Lost a tire because I thought I knew when the lug nuts were tight enough.
Also, not a bad idea to get the wrench calibrated occasionally.

Will note this!

[Mystic ZR-1]

Make sure the bolt holes are still round...

[Flyman 27]

You are so lucky, if that wheel had let go it would have done a LOT of damage, plus the wreck....

[haber rj]

Wow sure am glad that you decided not to drive it. Anyway in the end all is good enjoy your ride.

[GOLDCYLON]

So, I got the car up on stands this morning, ready to manually turn the wheel and see what was going on. The first thing I notice is that the driver rear wheel is loose! OMG, like really loose :eek: I could rock it back and forth and 4 lugs came off by hand.

Took the wheel off and turned by hand...no noise. So, I guess the sound was due to the loose wheel?

I'm feeling very lucky! I guess when I swapped the wheels last time I must have missed tightening these lugs down (I was in a bit of a hurry). Oh man.

Thanks all for the feeback

John




wow to me it sounded like the rear axle hub was bad. Bolt it up and let us know

[jcruz]

wow to me it sounded like the rear axle hub was bad. Bolt it up and let us know

Actually, I'm still battling a significant problem on this one!

After I got the lugs all tightened up I wanted to do more testing -- rotated all 4 wheels by hand when it was on stands. No noise. Problem solved, so I thought.

When I take it off the stands and move the car back and forth -- ca-lunk!

I'll get another video...

[lfalzarano]

Just thinking, with no load on wheels, bearings and suspension no noise and then load is applied??? When you had it on jacks, did you check the other areas or stopped, assuming it was the loose lug nuts?


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[jcruz]

Just thinking, with no load on wheels, bearings and suspension no noise and then load is applied??? When you had it on jacks, did you check the other areas or stopped, assuming it was the loose lug nuts?


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Did not check other areas. I'll get it back up on jacks after I get a new video...