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Old 04-27-2010, 12:47 PM   #4
Moparteacher
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Join Date: Nov 2007
Location: Boise
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Default Re: Alignment question..

Start at the rear tires. Confirm zero thrust angle.
Move up front.
Zero camber
Zero cross camber.
This should result in zero or near zero cross SAI. If not, suspect a bent steering knuckle, spindle, or ball joint.

Zero cross caster.
Positive caster helps with high speed stability but too much may complicate the alignment.
Steering gear must be centered. Not the steering wheel, but gear.
Center link should be level and parallel with the ground surface.
Ride height should be equal left to right.
Tie rod assemblies should be equal in length, left to right, and parallel to the lower control arm. Tie rod assemblies should also be equal in length to the lower control arm, Pivot to pivot.
Outer tie rods should be equal in distance to the ground and to the back side of the rotor. Modifications to the steering knuckle may be necessary to achieve preferred tie rod position.
Heim joints and shimming may help with outer tie rod positioning.
Taller than stock upper ball joints may help minimizing camber changes through joince and rebound.

Tie rod length and positioning helps to correct changes in toe through joince and rebound.

When done correctly there should be zero toe change throughout jounce and rebound.
Good luck.
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