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10-09-2008, 07:46 PM
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Hummer Veteran
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Join Date: Mar 2008
Posts: 205
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Re: Clunk on Aceleration from a stop
If the clunk is on acceleration and braking then it sounds like hubs might be bad or as you have already fixed bearings. If the clunk is is when turing the wheels left or right and so forth then I would look into the steering components more. I have had both of these problems and I am curently in the process of re-doing the entire steering system. This including new pitman arm, new Idler arm idler support, pitman support and idler block, with new tierods to finish it off.The clunk sound on acceleration was fixed for me when I replaced the HUB.
thanks
B
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10-10-2008, 04:06 AM
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Hummer Authority
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Join Date: Sep 2005
Location: Texas
Posts: 1,795
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Re: Clunk on Aceleration from a stop
Remove skidplate to see if that's causing it
Also, check bolts on rear lower control arms.
__________________
H2 SUT 4.56 Gears, Front Locker, Cognito Pitman/Idler kit & Idler Pivot Kit, Fab Tech Tie Rods, True Tech Trailing Arms, Edelbrock Panhard Rod, PML rear Diff & Tranny Pans, Corsa Exhaust, Dynatech LT Headers, Diablo Predator Programmer, Volant CAI, Warn 9500 Winch, Escort 8500x50 & ZR3 Laser Shifter, Delta Light Bar, Rancho Steering Stabilizer & Bilstein Shocks, Ron Davis Radiator, PowerSlot Rotors, Hawk Brake Pads
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10-16-2008, 03:28 PM
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Hummer Guru
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Join Date: Jan 2005
Location: Oregon
Posts: 4,321
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Re: Clunk on Aceleration from a stop
I had a cross membr bushing go bad. If I remember correctly, it was in the front.
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If it has tires or testicles, you're going to have trouble with it
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10-24-2008, 06:58 PM
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Hummer Professional
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Join Date: Feb 2003
Location: Palm Desert, CA
Posts: 470
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Re: Clunk on Aceleration from a stop
A broken motor mount can cause this sound also....
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2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Dynatech long tube headers, catback,18\" Ambush w/Toyo MT\'s,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo\'s, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev Suburban Blown
1970 Trans Am balanced, blueprinted, ceramic headers, etc.
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12-07-2008, 08:51 AM
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Hummer Guru
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Join Date: Jun 2006
Location: Out West
Posts: 2,539
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Re: Clunk on Aceleration from a stop
I have a clunk, too, when going from a stop position to accelerate. I was told it's probably just a suspension noise (because of the weight of the H2). Now that I'm reading others have this and it's not the suspension, I'll have to make another trip to the dealer.
__________________
2008 H2 Graystone Metallic
2006 H3 Black (sold)
previously known as Hmmm3
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12-07-2008, 05:24 PM
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Hummer Professional
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Join Date: May 2006
Location: las vegas
Posts: 301
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Re: Clunk on Aceleration from a stop
my 08 sut does the same thing...
__________________
scott j.
2008 h2 sut
2008 escalade
1969 charger
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12-08-2008, 03:15 AM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: Clunk on Aceleration from a stop
Check your front diff mounting bolts. We just had one in where the rear lower bolt fell out, the diff spun up and took out the oil filter, luckily the customer had the presence of mind to shut it down before killing the motor.
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