- Install the alignment equipment in accordance with the equipment manufacturers instructions.
- Adjust the tire pressures to the correct specifications
- Check frame to body alignment with Frame Alignment Tool J-43628. If frame to body alignment is not correct, loosen fasteners and align frame to body.
- Measure the alignment angles for each wheel.
Important: When measuring alignment angles, it is critical that vehicle curb trim height be within specifications. If not correct, add or remove weight until trim height is correct. Refer to "Curb Trim Heights" .
Important: When performing a wheel alignment after any suspension system component removal and installation, the vehicle must be driven and/or the suspension system worked, manually bounced at least 20 times, to allow components to locate properly before alignment adjustment.
| • | 207 kPa (30 psi) tire pressure - Front Tires |
| • | 207 kPa (30 psi) tire pressure - Rear Tires |
Cross camber and cross caster specifications refer to the difference between the left and right side angles. Cross camber and cross caster can influence vehicle steering pull tendencies. Usually, alignment results will be best when these measurements are as close to zero as possible.
(L) - (R) = CROSS
For example: If the LF camber equals -0.90 minus a RF camber equal to +0.50 the resulting cross camber would equal -1.40 which is OUT OF SPEC and NOT OK. (0.90) - (+0.50) = -1.40. If the LF camber is equals -0.60 minus a RF camber of -0.30 the resulting cross camber would equal -0.30 which is WITHIN SPEC and OK. (-0.60) - (-0.30) = -0.30.
-- | Preferred Setting (Degrees) | Minimum (Degrees) | Maximum (Degrees) |
|---|---|---|---|
FRONT | |||
Camber: | -1.00 | -1.50 | -0.50 |
Cross Camber: | 0.00 | -1.00 | +1.00 |
Toe Per Wheel: | +0.10 | +0.02 | +0.18 |
Total Toe: | +0.20 | +0.04 | +0.36 |
Caster is Not Adjustable | |||
Caster: | +3.70 | +3.20 | +4.20 |
Cross Caster: | 0.00 | -1.00 | +1.00 |
REAR | |||
Toe Per Wheel | +0.05 | +0.05 | +0.12 |
Total Toe: | +0.10 | +0.10 | +0.24 |
Caster is not Adjustable | |||
Camber: | -0.50 | -0.50 | -1.00 |
Cross Camber: | 0.00 | -0.50 | +0.50 |
Incorrect Wheel Alignment
| • | Tread is worn on one side of the tire more than the other. |
| • | Tread blocks have scuffed, feathered or cupped appearance. |
Lack of Rotation
Front tires worn more than rear tires.
Wheel/Tire Imbalance
Worn Suspension Parts
| • | Wheel bearing looseness. |
| • | Front suspension loose/worn. |
| • | Steering parts loose/worn. |
| • | Front control arm ball stud or bushing loose or worn. |
| • | Strut dampers worn or damaged. |
Rear Wheel Alignment
Important: Rear wheel alignment angles must be set to correct specifications before front wheel alignment angles are adjusted.
Rear wheel alignment involves setting the toe angle. Rear wheel camber is not adjustable.
