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"CLUNK" when releasing brake pedal

Old 04-21-2013, 09:15 PM
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Default "CLUNK" when releasing brake pedal

I'm getting a CLUNK noise from what sounds like the rear brake area after I stop & then RELEASE the brake pedal. It's more obvious when down hill. Only when the pedal is released. Never when applying the pedal.

If I coast (in neutral) and apply the brakes & stop.........then release.....it doesn't happen. Only in drive. Never in reverse. Never in neutral.

I replaced the drums & shoes. Just in case I did something wrong I took it by a shop & the guy heard it so he machined the new drums a little & readjusted things & it was better for a couple of days. Now it's worse than before. Also now in reverse & forward as I come to a stop or slowly back up I get an "out of round" scraping sound. And the CLUNK is getting louder at every stop & release.

Today I applied the E brake while going about 40mph for about 3 seconds. Did that 5 times. Didn't help. I also drove at a pretty good pace in reverse & slammed the brakes hard to "self-adjust". 3 times. Didn't help.

Can't figure this out & what really has me puzzled is if it's the brakes.......how come it doesn't happen while stopping & releasing in neutral?

Anybody know or have thoughts? Thanks.
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Old 04-21-2013, 09:26 PM
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Check the rear driveshaft. Look at the u-joints and lube the slip yolk.
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Old 04-21-2013, 09:30 PM
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Originally Posted by Nickel View Post
Check the rear driveshaft. Look at the u-joints and lube the slip yolk.
Thanks & sorry I should have mentioned.....already replaced U-joints so they are OK

Last edited by randall L; 04-23-2013 at 04:15 PM.
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Old 04-23-2013, 04:16 PM
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Any "clunk" experts there?
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Old 04-23-2013, 07:46 PM
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Lube the slip yoke.

See where the drive shaft goes into the transmission? There's a rubber boot. Remove the clamps on that boot, and slide the boot out of the way.

Now you should see the splines of the slip yoke.

Take a handful of grease and lube it up really good.

Put the boot back, re-install the clamps.

Problem should go away almost immediately.
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Old 04-23-2013, 08:09 PM
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Thanks. I'll crawl back under there in the morning & check it out. If I still get the CLUNK.......I'll call you back.
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Old 04-23-2013, 08:43 PM
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I just went through a similar thing and it was the rear u-joint (missing a few needle bearings) but I also lubed the SY and changed the transfer case fluid. Clunk is all gone and it shifts so smoothly. Mine is a 5spd but same difference. You're looking at about four hours all told.
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Old 04-23-2013, 09:01 PM
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I swear it sounds & feels like the rear brakes but not getting the CLUNK while applying brakes in neutral tells the true story I suppose.

I replaced the u joints about 3 weeks ago so I'll dig deeper.

Thanks for the replies.
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Old 04-24-2013, 02:44 AM
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Check your wheel cylinders. You mentioned you only replaced the shoes and drums.
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Old 04-24-2013, 08:26 PM
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Originally Posted by randall L View Post
I swear it sounds & feels like the rear brakes but not getting the CLUNK while applying brakes in neutral tells the true story I suppose.

I replaced the u joints about 3 weeks ago so I'll dig deeper.

Thanks for the replies.
Oh I know, that's what i thought it was too... but I was wrong. It was most certainly the slip yoke.
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