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driveline clunk

driveline clunk

Postby zeke [OP] » Apr 18 2011, 8:54pm

I have a 2011 sierra 4x4 5.3L and I have aclunk in the driveline. When I'm slowing down from say 30-40MPH and don't come to a complete stop and then hit the gas again I get a definite clunk in the driveline, Could this be the spline joint needing some lube? I hope it is just that. Also there is no clunk from a standing start only when slowing and then accelerating again. Just want to get some ideas before I have to go off to the dealer.
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Related Topics  Driveline Clunk   Driveline clunk.   Dreaded driveline clunk   Driveline Clunk Repair   Another driveline clunk question   Hard transmission downshift vs. driveline clunk   Clunk...clunk... Service 4wd   Driveline vibration   Driveline Vibration   Driveline Popping? Need Input   new Vortec and 4l60e Driveline leveling HELP   rear lift block driveline vibration   Clunk going into 4 low   Clunk when accelerating 
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Re: driveline clunk

Postby Hartski » Apr 18 2011, 9:22pm

Tourque converter locking up, maybe?
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Re: driveline clunk

Postby Stepdaddy » Apr 18 2011, 10:04pm

Ive noticed the same issue...deffinitly a clunk like there may be to much slack somewhere...but I think i hear it and dont feel it. I have a 2011 ext cab 5.3 2x4 though.
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Re: driveline clunk

Postby zeke [OP] » Apr 18 2011, 10:40pm

I thought that also (excess slack/gear lash) but I'm hoping it is just the slip joint needing lubrication/grease. I can hear it and feel it but if I just barely ease into the accelerator it is fine no clunk, but that's not possible most of the time.
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Re: driveline clunk

Postby F15E154 » Apr 18 2011, 11:06pm

Does it on my 2010 Silverado.
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Re: driveline clunk

Postby zeke [OP] » Apr 18 2011, 11:16pm

Did you ever have the dealer diagnose it?
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Re: driveline clunk

Postby F15E154 » Apr 20 2011, 3:03am

Sorry - late reply. I did not - there is a clunk - but seems normal. I figure if it sh!ts itself, I've got a 5 year 100,000 mile warranty on the drivetrain.
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Re: driveline clunk

Postby dano69 » May 03 2011, 4:29pm

I have a 2000 Z71 that had the same clunk. I took it to the dealer and they said it was normal slack. Not true. Slack is when you start out from a stop and it clunks, like a train starting to move. The tranny trashed itself, and when the dealer replaced the tranny, the clunk was still there. After a few thousand miles I decided to change the tranny filter and fluid. When I dropped the pan I found 4 selenoids there. I barely touched one of the plugs to one of the rear selenoids and it fell off. I simply reconnected it properly and checked the other 3 connectors and the other rear one was also loose. The 2 in the front were ok. Long story short, no more clunk.
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Re: driveline clunk

Postby Stepdaddy » May 03 2011, 7:43pm

I noticed that when in gear selection mode...or whatever you call it, leaving it in first the noise is much more prevalent. like the OP siad...thank god for a warranty and my daily round trip is around 6 miles.
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Re: driveline clunk

Postby Z15 » May 03 2011, 11:59pm

Note - DO NOT grease the splines on a 4x4 truck, just use ATF. If you use grease it will migrate into the transfer case and mix with the ATF and could lead to serious problems by contaminating the fluid in the transfer case. Service bulletin out on this, grease is only to be used on 2wd trucks.
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