See Figures 1, 2 and 3
Alignment should only be performed after it has been verified that all parts of the steering and suspension systems are in good operating condition. The truck must be empty. The tires must be cold and inflated to the correct pressure and the test surface must be level and horizontal.
Because special, elaborate equipment is required for proper front end alignment, it is recommended that the truck be taken to a reputable alignment
Caster is the tilt of the front steering axis either forward or backward away from the front of the vehicle.
Caster on 1970-85 4WD Pick-Ups and all Land Cruisers is not adjustable. If caster is out of specification on these models, check for worn or damaged suspension parts.
Caster on 1986-88 4WD Pick-Ups and 4Runners is adjustable by means of cam bolts on the lower control arms.
Caster on all 2WD models is adjustable by adding or subtracting shims at the upper control arm shaft
Camber is the slope of the front wheels from the vertical when viewed from the front of the vehicle. When the wheels tile outward at the top, the camber is positive (+). When the wheels tile inward at the top, the camber is negative (-). The amount of positive and negative camber is measured in degrees from the vertical and the measurement is called camber angle.
Camber on 1970-85 4WD Pick-Ups and all Land Cruisers is not adjustable. If camber is out of specification on these models, check for worn or damaged suspension parts.
Camber on 1986-88 4WD Pick-Ups and 4Runners is adjustable by means of cam bolts on the lower control arms.
Camber on all 2WD models is adjustable by adding or subtracting shims at the upper control arm shaft
Toe is the amount measured in a fraction of an inch, that the front wheels are closer together at one end than the other. Toe-in means that the front wheels are closer together at the front of the tire than at the rear; toe-out means that the rear of the tires are closer together than the front.
Although it is recommended that this adjustment be made by your dealer or a qualified shop, you can make it yourself if you make very careful measurement. The wheels must be dead straight ahead. The truck must have a full tank of gas, all fluids must be at their proper levels, all other suspension and steering adjustments must be correct and the tires must be properly inflated to their cold specification.
- Toe can be determined by measuring the distance between the centers of the tire treads, at the front of the tire and the rear. If the tread pattern of your truck's tires makes this impossible, you can measure between the edges of the wheel rims, but be sure to move the truck and measure in a few places to avoid errors caused by bent rims or wheel runout.
- If the measurement is not within specifications loosen the retaining clamp locknuts on the adjustable tie rods.
- Turn the left and right tie rods EQUAL amounts until the measurements are within specifications.
- Tighten the lock bolts and then recheck the measurements. Check to see that the steering wheel is still in the proper position. If not, remove it and reposition it as detailed later in this section.