ADJUSTMENTS
Note. Before making any adjustments, check ride height of vehicle. Measure and record all alignment angles.
CAMBER & CASTER ADJUSTMENT
- Original control arm does not allow adjustment of camber and caster. Camber and caster may be adjusted only by using Adjustment Kit (J 38794). Raise vehicle and support under lower control arms. Remove and discard upper control arm-to-frame bracket bolts, nuts and washer.
- Remove large washers welded to upper control arm frame brackets. Remove weld beads from upper control arm bracket. Grind area smooth. Install adjustment cams to bracket. (Scheme 1)
- Install bolt. Adjust camber and caster to correct specifications by rotating bolt head. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-55271-S37237760262001011800000). Tighten nuts to specification. See «TORQUE SPECIFICATIONS»(ref-55271-S40714813672001011800000).
Scheme 1
TOE-IN ADJUSTMENT
Note. Tie rod adjuster parts often become rusted in service. If torque required to remove nut from bolt after break-away exceeds 84 INCH lbs. (9 N.m), discard nuts and bolts and replace with correct numbered parts.
- Center steering wheel and hold with steering wheel clamp. Loosen tie rod lock nuts or adjustment sleeve clamp bolts. Rotate inner tie rods or adjustment sleeves to align toe to specification. See «ALIGNMENT SPECIFICATIONS»(ref-55271-S37237760262001011800000) .
- Ensure number of threads showing on each tie rod or inside each adjustment sleeve is nearly equal. Ensure tie rod ends are square before tightening lock nuts. Tighten tie rod lock nuts or adjustment sleeve clamp bolts to specification. See «TORQUE SPECIFICATIONS»(ref-55271-S40714813672001011800000) .
| Application | Preferred | Range |
|---|
| "C" 15/25 Pickup, Sierra & Suburban (2WD) |
| Camber (1) (3) | 0.5 | 0-1 |
| Caster (1) (3) | 3.75 | 2.75-4.75 |
| Toe-In (2) | 0.12 (3) | 0.02-0.22 (0.5-5.5) |
| "K" 15/25 Pickup, Blazer, Sierra, Suburban & Yukon (4WD) |
| Camber (1) (3) | 0.65 | 0.15-1.15 |
| Caster (1) (3) | 3 | 2-4 |
| Toe-In (2) (4) | 0.12 (3) | 0.02-0.22 (0.5-5.5) |
| (1) Measurement in degrees. (2) Measurement in inches (mm). (3) Left and right adjustments must be within 0.5 degree of each other. (4) Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0°. |
| (1) | Measurement in degrees. |
| (2) | Measurement in inches (mm). |
| (3) | Left and right adjustments must be within 0.5 degree of each other. |
| (4) | Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0°. |
WHEEL ALIGNMENT SPECIFICATIONS
| Application | Preferred | Range |
|---|
| Camber (1) | 1.25 | (3) .75-1.50 |
| Caster (1) | 5.0 | (3) Nominal |
| Toe-In (2) | .06 | 0.0-.12 (0.0-3.0) |
| (1) Measurement in degrees. (2) Measurement in inches (mm). (3) Reference only, no means of adjustment provided. |
| (1) | Measurement in degrees. |
| (2) | Measurement in inches (mm). |
| (3) | Reference only, no means of adjustment provided. |
WHEEL ALIGNMENT SPECIFICATIONS (C 35 CAB & CHASSIS (I-BEAM)
Scheme 2
