Author Topic: Cherokee - *clunk* when releasing brake pedal  (Read 11025 times)

MiniVanMan

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Cherokee - *clunk* when releasing brake pedal
« on: May 19, 2011, 10:51:14 PM »
Sounds like it's at least the left front caliper, not sure about the right side but I can hear the left when I have the windows down.

Most times when I left off the pedal after being stopped, I hear a clunk of some sort. Not sure what it could be... haven't had time to take the calipers off and look.

Brakes feel fine. Starting to squeal a bit so I'm doing pads soon, will likely figure it out then... but just curious, is this just one of those noises that Jeeps make and I shouldn't be concerned about?

Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #1 on: May 19, 2011, 10:59:59 PM »
Loose bolt perhaps?

Meatywand

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #2 on: May 19, 2011, 11:01:00 PM »
U-Joint maybe...they make noises when they start coming apart.
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87Warrior

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #3 on: May 20, 2011, 12:23:27 AM »
Caliper slides probably need a little lube. Could also be the brake pad 'popping' out of, or into, place along the knuckle if shims were not used on the last brake job. The factory single piston design is known to flex during hard braking (pads and knuckle attachments points). More than likely it will disappear once you do the brakes.

There is a slight possibility it could be any of the suspension bushings moving a bit, but if you cant reproduce it other than when releasing the brakes I would not worry.


Meatywand

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #4 on: May 20, 2011, 12:26:58 AM »
Caliper slides probably need a little lube. Could also be the brake pad 'popping' out of, or into, place along the knuckle if shims were not used on the last brake job. The factory single piston design is known to flex during hard braking (pads and knuckle attachments points). More than likely it will disappear once you do the brakes.

There is a slight possibility it could be any of the suspension bushings moving a bit, but if you cant reproduce it other than when releasing the brakes I would not worry.


Yeah all 8 of my lower control arm bushings are pretty much toast...my Jeep makes neat noises all the time now :lol:
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Mr. Luos

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #5 on: May 20, 2011, 02:12:33 PM »
Caliper slides probably need a little lube.
My first thought as well.
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Kalgorn

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #6 on: May 20, 2011, 02:33:50 PM »
Caliper slide pins making a clunk though? I didn't think they would need to slide enough that, even with sticking, would make a clunking noise. That's some serious play in your calipers if that's possible.

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Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #7 on: May 20, 2011, 02:45:50 PM »
Caliper slide pins making a clunk though? I didn't think they would need to slide enough that, even with sticking, would make a clunking noise. That's some serious play in your calipers if that's possible.

That's why I suggested a loose bolt or worse, a loose caliper pin.

Meatywand

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #8 on: May 20, 2011, 04:21:11 PM »
I think it's a bushings or U Joint, that sounds more likely.
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Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #9 on: May 20, 2011, 04:24:21 PM »
I think it's a bushings or U Joint, that sounds more likely.

I would agree if it weren't for letting his foot off the brake.  Everything is settled and in place by that point.  The U-Joints on mine were so bad that the bushings were ground into dust and I didn't get a clunk when letting my foot off the brake.

Meatywand

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #10 on: May 20, 2011, 05:22:49 PM »
My control arms will make a clunking when I let off the brakes because the bushings are shit, so it's worth checking.
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87Warrior

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #11 on: May 21, 2011, 12:26:36 AM »
And if it is the stock control arm bushings, don't buy new. PM me and I will send you a used set of arms at 30K miles with like new bushings. Was gonna use them on the Comanche, but I need aftermarket adjustable.

Could be the unit bearing/hub too. Press and hold brakes holds the bearing in place. Release and it drops.

Mr. Luos

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #12 on: May 21, 2011, 12:52:23 AM »
If the slides stick even a little....when they pop in they will clunk.
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Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #13 on: May 21, 2011, 01:06:42 AM »
And if it is the stock control arm bushings, don't buy new. PM me and I will send you a used set of arms at 30K miles with like new bushings. Was gonna use them on the Comanche, but I need aftermarket adjustable.

Could be the unit bearing/hub too. Press and hold brakes holds the bearing in place. Release and it drops.

Or just buy a lift and get it all new :mrgreen:

Kalgorn

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #14 on: May 21, 2011, 09:45:32 AM »
If the slides stick even a little....when they pop in they will clunk.

I've just never heard of that. The slide pins on my Honda were in pretty bad shape up until recently. I replaced all the pads and greased the slide pins. On the rears, one side, one of the pins was pretty tight and on the other side one of the pins was completely seized. Never once had clunking.

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b00sted

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #15 on: May 21, 2011, 03:27:20 PM »
I would agree if it weren't for letting his foot off the brake.  Everything is settled and in place by that point.  The U-Joints on mine were so bad that the bushings were ground into dust and I didn't get a clunk when letting my foot off the brake.

I wouldn't rule it out.  In 2wd the front axle and driveshaft freewheels, so if there is some play in the u-joint you can definitely get a clunk as soon as the truck starts to roll.


I'd go for side to side play in the caliper pins.

Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #16 on: May 21, 2011, 04:23:09 PM »
I wouldn't rule it out.  In 2wd the front axle and driveshaft freewheels, so if there is some play in the u-joint you can definitely get a clunk as soon as the truck starts to roll.


I'd go for side to side play in the caliper pins.

I wouldn't rule it out, no, but it's not as likely as the caliper pins like we've both said, the control arm bushings are more likely too, or as someone else said, the hub.  I seem to remember mine doing that with the hub when it was bad on my Jeep.

Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #17 on: June 02, 2011, 12:17:45 AM »
Any resolution on this, Nick?

jeepinator

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #18 on: June 02, 2011, 05:36:58 AM »
Mine was doing this when letting off the brake,
it was definitely a clunk, and front u-joints fixed it.
We did all the u-joints at once I think there were like fucking 9?

angry hampster

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #19 on: June 02, 2011, 08:29:45 AM »
Woops, wish I'd have seen this earlier. My ZJ did this, and new u-joints in the front fixed it. It also clunked when going side-to-side, so I had the tie rod ends replaced too.

MiniVanMan

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #20 on: June 02, 2011, 09:36:55 AM »
Any resolution on this, Nick?

Not yet, haven't had time to get under it and look.

Meatywand

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #21 on: June 09, 2011, 07:16:34 PM »
Woops, wish I'd have seen this earlier. My ZJ did this, and new u-joints in the front fixed it. It also clunked when going side-to-side, so I had the tie rod ends replaced too.
Yup, all of those cause all kinds of racket, I figure it's way more likely suspension related than brake related.
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MiniVanMan

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #22 on: March 22, 2013, 09:53:45 PM »
Oh i forgot about this. Figured it out a long while back... sticky slip yoke. Lubed the splines, all better.

MadFairlane

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #23 on: March 23, 2013, 06:38:25 AM »
Front fell off??
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Onyx Dragon

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Re: Cherokee - *clunk* when releasing brake pedal
« Reply #24 on: March 23, 2013, 05:34:18 PM »
Front fell off??

That would only happen if it were Australian.