Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

Loud front end clunk at hade acceleration

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  #1  
Old 05-22-2021, 10:08 AM
molonlabe63's Avatar
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Default Loud front end clunk at hade acceleration

I have 2007 H2 with 250K miles and have a loud front end clunk at hade acceleration. Only heard from a stop. Occurs in high and low gear. Changed transfer case fluid appears normal. No adverse sound at all while driving. Could the front u-joints cause this? Any suggestions much appreciated. Also had the upper and lower ball joints replaced a while back.
 
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Old 08-02-2021, 12:36 PM
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Originally Posted by aoneter12
Well it has been about a week since then and not only has the noise gotten worse but the car has also developed a very nasty sounding clunk while accelerating as well. Im really unsure of what to even be looking for at this point because every time I look under the car everything feels solid and nothing looks broken or loose at all.
Talking to yourself???

All H2 questions go in the H2 section so that other H2 owners might be able to help.
 
  #3  
Old 08-11-2021, 10:39 AM
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Default Front end clunk

Just saw this, but I was having the same problem. Turned out the front differential bolts were loose. Replaced 3 bolts and no more clunk. The main bolt that was causing it was right next to the oil filter
 
  #4  
Old 08-11-2021, 12:50 PM
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Unbelievable.
 
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