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08 GMC Sierra
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53 Posts
Discussion Starter #1 (Edited by Moderator)
Moderator's note: Please read the whole thread, but the solution is especially in posts 28, 31, 35, 50, and 51.

I have read many of the threads on the Yoke Clunk issue. Many of them are not current. Is there any updates or changes to fixing the issue? I read about greasing the yoke, nickel coated yoke and the bouncy ball. Just not sure where to go with this.

Mine clunks on acceleration, braking and sometimes i will be sitting at a traffic light, several minutes pass, then clunk... The tension and stress on whatever is causing is very bothering.

Thanks.
 

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The Wop
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351 Posts
i greased mine, worked great. just make sure you mark the spots on the driveshaft before you drop it and realign after the fact. it usually wont hurt anything, i freaked out when it happened though bc i thought something went bad in my tranny, and it was right after i got it built.
 

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880 Posts
My 07 nnbs does it. I thought it was because of my lift but they all do it my dads is stock and sane thing
 

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8,303 Posts
My 2003 ECSB 4wd had a horrible clunk when shifting into reverse and in between the 1-2 shift. The harder/firmer the shift, the less it seemed to clunk. If I drove slow with a really soft/loose shift, it clunked worse. I had the dealer grease the yoke with their special GM grease, but it didn't cure the problem. It reduced the noise by about 40%. I always attributed it to my truck being lifted 10" and possibly not having the yoke fully engaged into the tailshaft. I measured it and it was engaged enough to drive with it, but I still wondered if lengthening the driveshaft would have solved the clunking problem.

I never heard my 2005 RCSB 2wd clunk, but the previous owner said he had the dealer re-grease the yoke under warranty at 10,000 miles. He said it clunked pretty bad on him at times, but it never once clunked enough to have me notice it while I drove it.

My current 2005 1500HD CCSB doesn't clunk at all. This truck has a 2 piece rear driveshaft with a carrier bearing, so maybe this setup is less prone to clunking. My last two trucks had single rear driveshafts.
 

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2,836 Posts
Mine too!!! I have heard a lot that do.
 

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Hotel Z71
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69 Posts
My old 2000 GMC 1500 4x4 did it bad. I had the yoke greased up and it went away though its not a permanent fix
 

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GMC Owner
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1,281 Posts
My current 2005 1500HD CCSB doesn't clunk at all. This truck has a 2 piece rear driveshaft with a carrier bearing, so maybe this setup is less prone to clunking. My last two trucks had single rear driveshafts.
Funny you mention that, I haven't noticed the clunk on my 2001 1500HD either.
My parents 2001 Yukon, however, clunks very loud when shifting from P -> any gear.
 

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Funny you mention that, I haven't noticed the clunk on my 2001 1500HD either.
My parents 2001 Yukon, however, clunks very loud when shifting from P -> any gear.
Yeah, I definitely think the yoke slips in and out of the tailshaft a lot less on a 2-piece rear driveshaft. Just seems like that carrier bearing keeps everything in place a little better.
 

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GMC Owner
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2,634 Posts
what exactly does the yoke clunk sound like, I don't believe my 02 Z does it.
 

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08 GMC Sierra
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53 Posts
Discussion Starter #15
i greased mine, worked great. just make sure you mark the spots on the driveshaft before you drop it and realign after the fact. it usually wont hurt anything, i freaked out when it happened though bc i thought something went bad in my tranny, and it was right after i got it built.
I've heard about marking the drive shaft... but why exactly are you doing this? What if I replace the slip yoke... I guess there is nothing to mark then?
 

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Friendly Funeral Director
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529 Posts
what do i grease it with?
 

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I went to the dealership, and got a small amount of grease, no charge. Just ask. The grease looks like peanut butter, and its expensive, $40.+ for a can.
 

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I went to the dealership, and got a small amount of grease, no charge. Just ask. The grease looks like peanut butter, and its expensive, $40.+ for a can.
same here. Used it on my extended cab truck on the carrier bearing side. Still working good. May not last as long if it was subjected to the hot trans fluid though in no carrier bearing type trucks.

Mr. 960
 
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