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Hd: Temperature Related Front End Clunk

vhato

By vhato
in Ask A GM Technician

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vhato Enthusiast

vhato

Posted
Posted

I am near whits end with this. Over the last 2 weeks I have developed a clunk or a bang I can feel below the drivers side floor board. Just as the truck is coming to a complete stop, it clunks or bangs and as I accelerate from a dead stop, I can hear AND feel the clunk/bang from my foot on the floor.

 

This seems to ONLY happen once I have been driving for about 20 minutes. Less than that, the truck is silent and vibration free. So I assume something is heating up. It feels and sounds like it is coming from the drivers side suspension or body area.

 

Two weeks ago, I discovered the stock drivers hub was worn, so I replaced the hub assembly. A few days later the clunking began, I figured I must have damged a shock, so I replaced the shocks and steering stabilizer (and d**n did they need it...The new Monroe Reflex shocks removed ALL body roll), but the clunk is still there. I even thought it was the steering column, so I fixed that. Now my steering is vibration free, but I still hear/feel the clunk at a dead stop as well as accelerating from a stop after drivng for about 20 minutes.

 

Here at GM-Trucks a quick search reveals about 14 threads relating to HD's with a temperature related drivers side, front end clunk at start/stop with NO posted solutions at all.

 

So I figure,

 

1. Could it be the drivers side brake caliper seizing once it gets hot?

 

2. Maybe the ABS sensor in the new HUB gets weird after it gets warm and I am hearing the ABS modulate unnecessarily?

 

3. A body bolt or something is loose and once I have been in motion for a while the body is clunking? But it is only after 20 minutes of driving all the time. So I doubt it.

 

4. The caliper pin mounting holes are worn out and the caliper is vibrating during a stop/start once the caliper mount gets warm?

 

Help?!??!

 

Thanks a million,

Vhato

vhato Enthusiast

vhato

Posted
  • Author
Posted
You did not include year that I can see. Please let us know what you are working on.

 

 

Sorry,

 

2004 2500HD, Crew Cab, 4x4, Vortec 6000 w/4L80-E and a 9200GVW

 

I learned that a little radio volume takes my mind off it. But it feels and sounds so close to the drivers side' its crazy!!

minibike132 Senior Enthusiast

minibike132

Posted
Posted

You said you fixed the collum, did you mean intermediate shaft. If you already replaced that I can't really think of anything common that makes noise on the driver side. Sorry I can't really help on this one without hearing or feeling it.

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