Good morning,
I bought a used 2008 Hummer H2 with 6,2cc engine. I noticed with the stock wheels and tires a sway on the freeway that felt like the body was going to come off the car.
In the car i give 1,5in lift.
I chanch the original shock with rancho xl9000 but aftrer a 3000-4000klm still i have the same filing with my car, and i thing i need to change again the shocks.
Did eny one know what can i do.
Thanks and sorry for my but english

 

Good morning,
I bought a used 2008 Hummer H2 with 6,2cc engine and 30.000m.
I noticed with the stock wheels and tires a sway on the freeway that felt like the body was going to come off the car.
In the car i give 1,5in lift and now they have almost 40.000m.
I chanch the original shock with rancho xl9000 but aftrer a 2.000-3000m still i have the same filing with my car, and i thing i need to change again the shocks.
Did eny one know what can i do.
Thanks and sorry for my but english.

 

I had wobble on my 05 h2 during hard turns with hard acceleration. I changed the origional shock but it did not solve the problem. I added duel skyjacker steering stablizers # 7298. It solved the problem but you can tell the power steering pump is working harder.

 

heres my .02 cents
On all of my hummer limos what we in the shop find is the following
First off check the rubber mount ON TOP of the shock.Seems that with more weight and bigger wheels theres a strain put on that top rubber and it blows out all the time.Ive actually made new ones from solid urethane and it solved that problem
Also did you check the lower control arm bushings?If your truck has any kind of mileage on it thats one weak point on the h2.I always keep a set of lower control arms with new bushings pressed and also weld in the lower shock mount because i have seen that mound come loose over time since its only bolted in by 1 grade 8 bolt.
check your Front CV joint.The nut that connects it into the front wheel bearing and hub can come loose over time causing a shake at speed and slop in the wheel.
Also make sure your wheels are hub centered,If not all the wheels lateral weight and play are held by the lugnuts not the wheel mounting pad.
Its alot of info but takes just a hour to go thru all of that and any exprienced tech can zero in on that problem for you.Seems that when people see a H2 they see dollar signs and want to just throw money at the problem instead of trying to find the real fix

 

Did you ever found the problem on your h2

 

I get Death Wobble problems on jeeps all the time, at least four or five a month come in. The H2 is a completely different beast. I would start out making sure the wheels are hubcentric. (meaning that the hole in the center of the wheel fits over the hub snugly with no space between. if not you can usually purchase a hub ring from the wheel manufacturer that is specific to your vehicle. It may not be the issue but it is very inexpensive and a common problem for peeps who use aftermarket wheels on their ride.