Our Hummer system is constructed much like all of our IFS systems with extended steering knuckles and high clearance crossmembers but the differences stop there. To properly address the H2’s fulltime transfer case we include a CV style front driveshaft with this system to provide smooth driveline operation. Also unique to this system is two 1/4” thick skid plates, one for the front differential and one for the transfer case. Rear lift on factory air bag H2’s comes from a super stout bag spacer while coil spring models receive replacement coil springs that are driver and passenger specific.

Hose Cutter, Razor Blade, or Sharp Knife
Hoist or Floor Jacks
Safety Stands
Safety Glasses
Air Compressor, or Compressed Air Source
Spray Bottle with Dish Soap/Water Solution

Before Starting Installation
NOTE Kit parts are prefaced by the word kit and appear in bold print.
1. Carefully read all warnings and instructions completely before beginning.
2. Verify all parts have been received in this kit by checking the parts list at the end of this document.
3. This suspension system is designed to be used with wheels with a backspacing of 3-3/4” or less. Wheels with greater then 3-3/4” backspacing including some factory wheels will interfere with upper control arm and cause damage to OE parts and/or tires. Distance from hub mating surface of rim to the sidewall of tire can not exceed 4-1/2”.
4. Exhaust modification:
a. Cross over pipe alteration is necessary to accommodate this suspension system on 6 cylinder models.
b. Trail Master offers kit NX3O accessory to perform this modification.
5. This suspension system is not recommended on extended cab models with 2 piece driveshafts.
6. On 4 cylinder and some 6 cylinder models (with R180A front differential carrier) differential cover will contact lower control arm bracketry. On these vehicles, kit #8040 is required in addition to the suspension kit to reposition the front differential carrier.
7. Only install this kit on the vehicle for which it is specified. If anytime during the installation you encounter something different from what is outlined in the instructions, call technical support at (928) 636-3175.
8. Special tools needed:
a. Ball joint separator
b. Torque wrench
c. Coil Spring Compressor
9. Park vehicle on a clean, dry, flat, level surface and block tires so vehicle cannot roll in either direction. Ride Height (For IFS w/ torsion bars)
NOTE Ride height measurements are essential for final torsion bar adjustment following the installation of this kit.
1. Measure ride height with the vehicle supporting its own weight on level ground. To settle the suspension, the vehicle should be driven forward at least 10 feet immediately prior to taking these measurements. Ride height is the measurement from the center of the axle straight up (vertical) to the fender lip. Record this measurement for all four wheels.

1. From under the vehicle use a measuring tape to measure from the muffler box seam back along the axis of the muffler inlet pipe 59mm (2.32”) and mark the point on the exhaust pipe. ( see figure 1) Note: This cut position is the same on both LH & RH side Exhaust Pipes.
2. Confirm the mark is in the correct location and cut the pipe along the marked cut line.
3. Remove the muffler from its rubber hangers and discard the old muffler. ( see figure 2) De-burr the end of the exhaust pipe.
4. Slide the exhaust clamp onto the new exhaust pipe. Install the replacement muffler onto the rubber exhaust hangers and slide the muffler onto the exhaust pipe. ( see figure 3)
5. Position tip in rear valence and tighten the clamp bolt to 32-35 FT.-LBS. ( see figure 4)
6. Repeat instructions for the opposite side.

Disconnect battery & remove all existing accessory drive brackets and components from motor. Remove water pump, scrape away any existing gasket material with a gasket scraper and dress surface with a Scotch Brite? pad. Clean and prep threads on engine block at water pump (3/8-16) and driver side bosses (7/16-14) by crank (for power steering kits). Use a 3/8-16 & 7/16-14 thread chaser if necessary. Thread chasers are available at your local auto parts store or tool dealer and are different from a thread cutting tool. Apply RTV sealer to one end of the four 3/8-16 x 3” threaded studs and thread studs into the water pump mounting holes and tighten. The studs can easily be tightened by threading two 3/8-16 zinc coated nuts onto the stud and tighten them against each other to act as a drive nut.

INSTALLATION PROCEDURES:
The saddle mount kit is designed to be used with 1987-95 YJ Wranglers. This mount is designed around a stock oil pan. If you are using an aftermarket oil pan, the maximum depth in the front is 4-1/2″. GM part number 12557558 (1986 and newer) has a front depth of only 3-1/2″ and provides the most mount to pan clearance We have designed this mount to position your new engine in the best location possible. Driveshaft modifications may be necessary depending on your application. We have had requests to allow some lateral adjustment with this mount. To supply this adjustment we have provided two 5/8″ spacers. Using these spacers, you can space the stock rubber mount 5/8″ to the front or rear of the saddlemount location.

Before Starting Installation
1. Carefully read all warnings and instructions completely before beginning.
2. Verify all parts have been received in this kit by checking the parts list at the end of this document.
3. Only install this kit on the vehicle for which it is specified. If anytime during the installation you encounter something different from what is outlined in the instructions, call technical support at (928) 636-7080.
4. Park vehicle on a clean, dry, flat, level surface and block tires so vehicle cannot roll in either direction.

Engine Compartment
1. Measure and record distance between cab and bed.
2. Disconnect both battery cables. Disconnect negative cable first, then positive cable.

Suggested Tools for Installation:
* Jack and proper load rated jackstands
* 21mm combination wrench
* 21mm 1/2” drive socket and ratchet
* Hammer

Installation Instructions
Step 1: Lock gunner turret ring.
Step 2: Open and secure gunner hatch.
Step 3: Remove existing gunner sling.
Step 4: Remove bolt securing existing gunner sling-hook bracket from turret using 9/16” (14mm) ratcheting closed-end wrench (a.k.a. gear wrench) (save his bolt as it will be used for installation of the Turret Bracket hook side (p/n: 901-US-07301-3 (discard the bolt that comes with the kit)).Existing Gunner Sling Hook Bracket (photos show two views of same bracket)

Before beginning the installation, read these instructions and the enclosed driver’s WARNING NOTICE thoroughly and completely. Also affix the WARNING decal in passenger compartment in clear view of all occupants. If any of these items are missing from this instruction packet, do not pro
ceed with installation, but call SKYJACKER® to obtain needed items. If you have any questions or reservations about installing this lift kit, call SKYJACKER® at 318-388-0816 for Technical Assistance or Customer Service departments. Make sure you park the vehicle on a level concrete or asphalt surface. Many times a vehicle is uneven (side-to-side) from the factory, but usually not noticed until a lift kit has been installed which
makes the difference more visible. Using a measuring tape, measure the front and rear (both sides) from the ground up to the center of the fender opening above the axle. Record below for future reference.