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Hummer H2 Rancho Suspension Lift - Elevated

Rancho Lifts The Hummer H2
By Ken Brubaker
Photography by Ken Brubaker
Hummer H2 Suspension Front View
Hummer H2 Suspension Rancho Lift Kit
1. Here's the kit (RS6556)... 
   
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Hummer H2 Suspension Rancho Lift Kit
1. Here's the kit (RS6556) as it arrived. The owner of this rig chose the black finish, but the kit is also available in red. The H2 we lifted did not have the optional rear air-spring suspension, so new rear coil springs were included. For those H2s fitted with air springs Rancho offers a kit (RS6557) that includes aluminum air-spring spacers.
Hummer H2 Suspension Remove Brackets Components
2. We began the install up... 
   
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Hummer H2 Suspension Remove Brackets Components
2. We began the install up front. After removing a number of components including the torsion bars, lower control arms, shocks, end links, steering knuckles, axleshafts, sway bar, and front differential, the driver-side crossmember/lower control-arm bracket was cut off to facilitate installation of the new subframe.
Hummer H2 Suspension Box Plate Weld Control Arm Frame
3. Once the bracket is cut... 
   
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Hummer H2 Suspension Box Plate Weld Control Arm Frame
3. Once the bracket is cut off, a supplied box plate is welded to the inside of the lower control-arm frame bracket. It's then painted to inhibit corrosion.
Hummer H2 Suspension Cut Uppper Differential Mount
4. Next, the upper mount is... 
   
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Hummer H2 Suspension Cut Uppper Differential Mount
4. Next, the upper mount is cut off from the front differential. Printed instructions with illustrations show how the differential should look when the process is completed.
Hummer H2 Suspension Differential Support Bracket
5. A differential support... 
   
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Hummer H2 Suspension Differential Support Bracket
5. A differential support bracket is then attached to the front differential. Some differentials (like ours) have a boss that must be drilled out for one of the mounting bolts.
Hummer H2 Suspension Mount Differential Subframe
6. The front-differential... 
   
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Hummer H2 Suspension Mount Differential Subframe
6. The front-differential assembly is then mounted to the new one-piece reinforced subframe.
Hummer H2 Suspension Lift Subframe Into Place
7. It takes a couple of people... 
   
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Hummer H2 Suspension Lift Subframe Into Place
7. It takes a couple of people to lift the subframe/differential assembly into position due to its weight. The subframe mounts in the factory lower control-arm frame brackets. Ours bolted right in. With this assembly installed, the front driveshaft is reconnected.
Hummer H2 Suspension Eliminate Contact
8. At this point it's important... 
   
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Hummer H2 Suspension Eliminate Contact
8. At this point it's important to ensure that the grease fitting on the steering relay rod does not contact the left side of the differential as the steering system is cycled. We had to remove a bit more material from the differential case to eliminate contact.
Hummer H2 Suspension Cast Steering Knuckles
9. Next up are the new extended... 
   
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Hummer H2 Suspension Cast Steering Knuckles
9. Next up are the new extended cast steering knuckles. Here you can see one of the new knuckles (left) compared to the stock knuckle.
Hummer H2 Suspension Install Knuckles To Ball Joints
10. The new knuckles are installed... 
   
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Hummer H2 Suspension Install Knuckles To Ball Joints
10. The new knuckles are installed to the upper and lower ball joints as shown here and then the O-rings, splash shields, ABS cables, hub and bearing assemblies, brake rotors, and calipers are installed on each side of the vehicle.

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