The adjustments are done indirectly:
* Camber: Camber is primarily adjusted by changing the position of the lower control arm. This usually involves replacing worn bushings or using shims (small metal plates) added between the control arm and the frame or axle. The upper control arm can also play a role but is less common for camber adjustment on these trucks.
* Caster: Caster is affected by the inclination of the kingpin (or steering axis, in the case of ball joints) On these trucks, caster adjustment is usually accomplished by changing the position of the upper control arm, sometimes using shims, and often necessitates replacing worn bushings to affect any significant change.
It's crucial to understand: Adjusting caster and camber on these older trucks is not a simple DIY task. It requires specialized tools, precise measurements, and a good understanding of suspension geometry. Incorrect adjustments can seriously compromise handling, tire wear, and even vehicle stability.
Strongly recommended: Take your 1984 Chevy truck to a qualified mechanic or alignment shop for caster and camber adjustments. They have the proper equipment and expertise to perform the alignment correctly and safely. Trying to adjust it yourself without the right tools and knowledge could lead to damage or accidents.
