RIDING HEIGHT ADJUSTMENT
Note. Before performing wheel alignment, perform preliminary visual and mechanical inspection of wheels, tires and suspension components. See PRE-ALIGNMENT INSTRUCTIONS in WHEEL ALIGNMENT THEORY/OPERATION article in the GENERAL INFORMATION section.
Note. Before performing wheel alignment, check and adjust riding height as necessary. Riding height is adjustable only on models equipped with air suspension.
| WARNING | DO NOT remove air spring under any circumstances when air spring is pressurized. DO NOT remove components supporting air spring without releasing air. Air suspension system must be shut off prior to hoisting, jacking or towing vehicle. Air suspension system can be deactivated by disconnecting battery or turning air suspension service switch to OFF position. Air suspension switch is located on left side of trunk area. Failure to deactivate air suspension system may result in unexpected inflation or deflation of air springs, causing vehicle to shift. |
ADJUSTING RIDING HEIGHT
Rear suspension riding height is adjusted by moving rear height sensor attaching bracket up or down based on left rear upper control arm position. A slot adjustment is provided on bracket to adjust up or down as required.
Adjusting sensor attaching bracket one index mark will change riding height, vertical dimension "D", approximately.35" (9 mm). (Scheme 1)and (Scheme 2). If riding height is not correct, adjust to specified vertical dimension. See DIMENSION "D" table.
| Application | Range: In. (mm) | Optimum: In. (mm) |
|---|---|---|
| Base Vehicle | 5.29-5.81 (131.8-147.8) | 5.50 (139.8) |
| Touring Package | 4.80-5.42 (121.8-137.8) | 5.11 (129.8) |
DIMENSION "D"
Scheme 1
Scheme 2
JACKING & HOISTING
| WARNING | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery. |
Note. On vehicles with air suspension, disconnect electrical power by removing negative battery cable or setting air suspension switch to OFF position. Switch is located in trunk on left front side of inner panel
FLOOR JACK
Note. DO NOT lift vehicle by placing jack under front or rear control arms, axle shafts or CV joints.
FWD
Front of vehicle may be raised by placing floor jack under front engine crossmember. Rear of vehicle may be raised by placing jack forward of tie rod bracket or under either rear lower control arm-to-chassis mounting bracket. (Scheme 3)
Scheme 3
RWD
- Front of vehicle may be lifted by positioning a jack under center of front crossmember, lower control arm-to-spindle connection or side rail where stabilizer is connected. Rear end may be lifted by positioning floor jack under rocker flange at contact points used for vehicle jack or under differential housing.
- Ensure jack does not contact differential housing cover. Position jackstands under front lower control arms or rear axle housing between suspension arm brackets and differential housing. DO NOT place jackstands under suspension arm brackets. (Scheme 4)
Scheme 4
BUMPER JACK
A bumper-type jack may be used.
HOIST
| CAUTION | Follow hoist manufacturer's instructions. DO NOT let hoist or adapters contact suspension, exhaust or steering components. |
Frame Contact Hoist
On frame contact hoists, adapters must be placed at 4 contact points. Position adapters so they are centered on contact area. All 4 contact points must contact adapters. On FWD models, rear contact points are located forward of tie rod-to-body attaching brackets.
CAMBER ADJUSTMENT (FRONT)
- Camber/Caster Adjusters (T79P-3000-A) are needed to adjust camber angles. Insert camber/caster adjusters into frame holes. (Scheme 5) Tighten adjuster hooks finger tight against upper arm inner shaft. Tighten hex nut of each adjuster one additional hex flat.
- Loosen upper arm inner shaft-to-frame retaining bolts so lock washers are unloaded. Firmly tap bolt heads to ensure loosening of retaining bolts. Adjust camber angle. Tighten upper arm inner shaft-to-frame retaining bolts.
Scheme 5
| Application | Preferred | Range |
|---|---|---|
| Camber (1) | 0.5 | 1.25 To 0.25 |
| Caster (1) | 5.5 | 4.75 To 6.25 |
| Toe-In (1) | 0.13 | 0.37 To 0.12 |
| Toe-In (2) | 0.06 (-1.5) | 0.18 To 0.06 (-4.5 To 1.5) |
| (1) Measurement in degrees. (2) Measurement in inches (mm). | ||
| (1) | Measurement in degrees. |
| (2) | Measurement in inches (mm). |
WHEEL ALIGNMENT SPECIFICATIONS
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) |
|---|---|
| Tie Rod Sleeve Clamp Bolts | 20-22 (27-30) |
| Upper Arm Inner Shaft Bolts | 100-140 (136-190) |
TORQUE SPECIFICATIONS