Loud Clunk/Banging Sound - JeepForum.com
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post #1 of 16 Old 10-07-2019, 12:26 PM Thread Starter
JustChillin
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Loud Clunk/Banging Sound

When slowing down I'm experiencing a loud banging and clunking sound coming from the front end. I have a mechanic friend looking at it and he can't recreate the issue when its up in the air, only when driving. he did notice a blown front axle diff bushing blown out. Anyone know what this could be? i was thinking it was driveshaft related, but he didn't think it was.

2009 WK 3.7 4x4
quad I
144k miles


Last edited by JustChillin; 10-07-2019 at 12:27 PM. Reason: jeep info
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post #2 of 16 Old 10-07-2019, 05:11 PM
YouStupidBunny
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Please, provide the conditions when you hear the noise. Coming to or from a stop? Do you notice it when you hit a bump or just after? Any specific side?
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post #3 of 16 Old 10-08-2019, 08:50 AM
Mainsail
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If it's when you first let your foot off the gas pedal it may be the front axle bushings. If you have 144K and are still on the original set they can't be long for this world. I have an appointment on the 11th to have mine replaced (at 115K) for around $1K, ouch...

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post #4 of 16 Old 10-08-2019, 09:26 AM
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Quote:
Originally Posted by Mainsail View Post
If it's when you first let your foot off the gas pedal it may be the front axle bushings. If you have 144K and are still on the original set they can't be long for this world. I have an appointment on the 11th to have mine replaced (at 115K) for around $1K, ouch...
Maybe try it yourself, not too hard and lot's of writeups around.

Or road trip to Calgay and I'll do it for ya..

I have my second set in the garage waiting to go on..

05 WK Limited 5.7, QDII, OME HD, 265/70/17 1.25" Spydertrax, CC, MBRP SS, 250xxxkms
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post #5 of 16 Old 10-08-2019, 12:21 PM Thread Starter
JustChillin
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maybe the past year i noticed a slight surge when i let off the accelerator. didn't happen all the time,but if i needed some speed and let off quickly i would feel the jeep surge a bit. now, it doesn't even seem drive-able. it accelerates fine. once you left of the gas it surges and clunks around. sounds and feels like something is being hit with a 3lb hammer.
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post #6 of 16 Old 10-08-2019, 12:30 PM Thread Starter
JustChillin
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are you getting loud noises? what signs did you have?
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post #7 of 16 Old 10-08-2019, 12:45 PM
Mainsail
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Originally Posted by Raffish View Post
Maybe try it yourself, not too hard and lot's of writeups around.

Or road trip to Calgay and I'll do it for ya..

I have my second set in the garage waiting to go on..
I don't have the room or the proper tools to do it right. I do almost all my own work, but sometimes it needs to be farmed out.

Poor grammar is something up with which I shall not put.
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post #8 of 16 Old 10-08-2019, 07:14 PM
nvrdone1
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mainsail: who wants to rip you off for a grand? I had mine done 3 months ago for $250.00 + parts.
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post #9 of 16 Old 10-08-2019, 07:19 PM
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IT might sound stupid, but when was the last time you had the front brakes done? if it was recent, did you double check the install? Could be a missing bolt, missing clip, something simple but easy to over look.
If it wasn't recent, are they (over)due?
Again, I know it sounds stupid, but sometimes its the easiest things that get overlooked.
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post #10 of 16 Old 10-08-2019, 07:44 PM
Mainsail
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Originally Posted by nvrdone1 View Post
mainsail: who wants to rip you off for a grand? I had mine done 3 months ago for $250.00 + parts.
Northridge4X4 here locally. I found their quotes matched everyone else's (that is reputable) around town. Who did yours?

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post #11 of 16 Old 10-08-2019, 09:36 PM
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I would first look at the front axle bushings. Do you notice it when shifting from park to reverse or drive? If that's your problem, how big it is depends on your tool box, skill, and patience level. Here are a couple videos (part 1 and 2) to watch and see if it's something you want to try.
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post #12 of 16 Old 10-09-2019, 12:49 AM
Chirpz
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Garage
I have a writeup on this procedure here:

https://www.jeepforum.com/forum/f67/.../#post40730243

Chirpz
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post #13 of 16 Old 10-09-2019, 08:25 AM
nvrdone1
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mainsail: Olympic 4x4 in Snohomish. they didn't remove the diff - just dropped it down & rotated it.

Last edited by nvrdone1; 10-09-2019 at 08:26 AM. Reason: add
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post #14 of 16 Old 10-09-2019, 09:25 PM
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Quote:
Originally Posted by nvrdone1 View Post
mainsail: Olympic 4x4 in Snohomish. they didn't remove the diff - just dropped it down & rotated it.
That MIGHT be possible if you have the right equipment. Not so easy if you are laying on your back in your driveway.

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post #15 of 16 Old 10-11-2019, 10:56 PM
Mainsail
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Originally Posted by Mainsail View Post
Northridge4X4 here locally. I found their quotes matched everyone else's (that is reputable) around town. Who did yours?
When I dropped it off I asked if they had gotten the diff fluid and the friction modifier and he looked a little confused, then the light came on.

I told them about the rotating vs dropping the whole diff and that's what they did.

It took them 4 hours vs the six they quoted me. All the bushings were bad, this one was the worse and the front one (the easy one) looked the best. The clunking is gone.
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Bush1.jpg  

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