Mystery Front End Clicking - Help Please - JeepForum.com
 
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post #1 of 7 Old 06-17-2021, 11:14 AM Thread Starter
HelpFromAbove
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Mystery Front End Clicking - Help Please

Greetings all,

I have a clicking noise in the front end of my 93 ZJ, but all my attempts at identifying it and fixing it, including having professional shops look at it, have ended in failure.

I am hoping someone can look at the list of facts that I have and tell me what I am missing. Facts presented in chronological order below:

Root Issue Appears - Clicking sound from front end of car, sounds like front driver side. Sound is nearly identical to what you hear when a CV or Wheel Bearing Fails. Changes with speed. Gets louder when coasting, braking, or turning, much quieter when under load.
Replace both Half Axles and Wheel bearings - No change to sound
Take to shop #1 for diagnostics - Confirms problem exists, can't identify source, but fairly sure that it is not CVs or Bearings.
Replaced Brake Pads and Rotors - No change
Take to Shop #2 for diagnostics - Can replicate issue. Performs exhaustive tests including removing front drive shaft. Front driveshaft removal does not change the issue (therefore not the transfer case or front differential). Suspects issue with brakes (but this seems unlikely to me since I changed pads and rotors). Can't definitively locate the issue but they concur it sounds like driver side source.

And that brings me to today. Been fighting this for months and can't seem to fix it.

The car drives fine but after nearly 30 years with her, I know when something isn't right and is gonna be a problem down the raod. Please examine the data, and any assumptions I may have implicitly made. I'm happy to admit I'm human and might be missing the obvious (please be polite if that's the case).

Thanks in advance for any help you can provide!

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post #2 of 7 Old 06-17-2021, 12:11 PM
kg6mov
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When you changed the pads and rotors, did you notice wear notches on the knuckle where the pads slide? That's a commonly missed wear point and it can cause odd behaviors.


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post #3 of 7 Old 06-17-2021, 12:20 PM
yjsaabman
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I'm just spitballing some ideas that should fairly simple to check.


Problem with the ABS sensor and or tone ring on the axle? Though the tone ring would have changed with the shaft change...

Have you tried swapping the wheels and tires side to side? Maybe something simple like a stone in the tread?

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post #4 of 7 Old 06-17-2021, 02:04 PM
Mr. Puddles
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can you replicate the sound with the wheel in question in the air?

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post #5 of 7 Old 06-18-2021, 10:46 AM Thread Starter
HelpFromAbove
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Quote:
Originally Posted by Mr. Puddles View Post
can you replicate the sound with the wheel in question in the air?
No. The shop that did the most recent testing reported that they can not replicate the issue while it is on the lift.
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post #6 of 7 Old 06-18-2021, 11:43 AM Thread Starter
HelpFromAbove
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Quote:
Originally Posted by kg6mov View Post
When you changed the pads and rotors, did you notice wear notches on the knuckle where the pads slide? That's a commonly missed wear point and it can cause odd behaviors.
I did notice the notches, but I put the shims in place that are designed for that occurrence. Furthermore, I had the issue before I changed the brakes, so I doubt that was it.
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post #7 of 7 Old 06-18-2021, 11:46 AM Thread Starter
HelpFromAbove
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Quote:
Originally Posted by yjsaabman View Post
I'm just spitballing some ideas that should fairly simple to check.


Problem with the ABS sensor and or tone ring on the axle? Though the tone ring would have changed with the shaft change...

Have you tried swapping the wheels and tires side to side? Maybe something simple like a stone in the tread?

Sent from my SM-G970U using Tapatalk
I've checked the tread for stones and there aren't any, plus its much more "clunk"-y than that would be... but swapping tires side to side is a great idea. I'll give that a go. If it follows it I'll be confused, but it would at least be another data point.
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