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06-27-2011, 01:01 AM
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Hummer Novice
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Join Date: Jun 2011
Location: Indianapolis, IN
Posts: 10
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
Humtech, there is a highway (I-69) within a few miles of the Carmax where the speed limit is 65 mph. The shake is in the seat. It is pretty non-existent up until 60 mph, is at it's worst between 65-70 mph, and isn't quite as bad at 75 mph. We don't drive over 75 mph, and generally stay in the 65-70 mph range. We do have a highway by our house (I-74) where the speed limit is 70 mph, so these speeds are pretty common for us, have never had any police issues for going 70-75 mph. BTW, no shake during braking.
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06-27-2011, 03:30 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: 07 H3 Shakes on highway at 65+ mph, normal?
Sounds like a seperated rear tire. Hard to say without driving it
__________________
1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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06-27-2011, 04:17 PM
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Hummer Novice
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Join Date: Jun 2011
Location: Indianapolis, IN
Posts: 10
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
Quick update: Talked with my sales rep. today and he says they will take care of it. I have to drop the H3 off this afternoon and HOPEFULLY it will be fixed by tomorrow. Thanks again to everyone for your comments, info, and warm welcome.
Mark
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06-29-2011, 09:33 PM
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Hummer Novice
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Join Date: Jun 2011
Location: Indianapolis, IN
Posts: 10
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
Weds. Update: H3 was sent from Carmax to Penske dealer for 'road balance' which could not be done at Carmax. Penske couldn't get to it until today, then they tell Carmax that it probably needs new tires. I'm assuming it must have still been shaking when driving at speed, didn't get that much detail in the voice mail. If Carmax replaces the tires and it still shakes only at 60+ mph, any guesses?
Mark
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06-29-2011, 11:56 PM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
could be a tight u-joint
__________________
1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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06-30-2011, 12:58 PM
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Hummer Veteran
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Join Date: Jun 2005
Location: Indianapolis, IN
Posts: 160
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
If the previous owner did not rotate the tires...the front tires are probably trashed......
__________________
Yellow Lux H3, w/Adventure Pkg, Borla, K&N.
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06-30-2011, 06:23 PM
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Hummer Novice
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Join Date: Jun 2011
Location: Indianapolis, IN
Posts: 10
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Re: 07 H3 Shakes on highway at 65+ mph, normal?
Thursday update: Carmax service called this morning and said a couple of the managers went for a test drive in my H3 earlier today. They felt the 'shake' and approved to have 4 new tires put on at their expense. Not sure I'll get it tomorrow, so this may go into next week.... but, I guess it will be worth it to have the problem fixed (hopefully) and to get 4 new tires for the inconvenience.
Mark
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