The A-Body cars use an aluminum-housed Saginaw manual rack and pinion steering gear as standard equipment. The pinion is supported by and turns in a sealed ball bearing at the top and a pressed-in roller bearing at the bottom. The rack moves in bushings pressed into each end of the rack housing.
Wear compensation occurs through the action of an adjuster spring which forces the rack against the pinion teeth. This adjuster eliminates the need for periodic pinion preload adjustments. Preload is adjustable only at overhaul.
The inner tie rod assemblies are both threaded and staked to the rack. A special joint is used, allowing both rocking and rotating motion of the tie rods. The inner tie rod assemblies are lubricated for life and require no periodic attention.
Any service other than replacement of the outer tie rods or the boots requires removal of the unit from the car.
The optional power rack and pinion steering gear is an integral unit, and shares most features with the manual gear. A rotary control valve directs the hydraulic fluid to either side of the rack piston. The integral rack piston is attached to the rack and converts the hydraulic pressure into left or right linear motion. A vane-type constant displacement pump with integral reservoir provides hydraulic pressure. No in-car adjustments are necessary or possible on the system, except for periodic belt tension checks and adjustments for the pump.