Raise and support vehicle. Remove wheels and tires. Pry off grease cap from rear of steering knuckle. See Fig. 1 . Using a chisel and hammer, unstake nut. While applying brakes, loosen axle shaft nut.
Fig. 1: Exploded View of Steering Knuckle (LS400)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Remove brake caliper and rotor. Remove 2 retaining bolts and steering knuckle from lower ball joint. Using Ball Joint Puller (09628-62011), press steering knuckle off upper ball joint. Remove steering knuckle and hub.
Place steering knuckle and hub in a soft-jawed vise. Remove axle nut and ABS speed sensor rotor. DO NOT scratch speed sensor rotor serrations. Turn knuckle over in vise, and remove 4 brake dust cover bolts.
Press axle shaft from knuckle with Universal Puller (09950-20017). Remove inner bearing race from axle shaft with universal puller. Remove grease seal with Oil Seal Puller (09308-00010). Remove snap ring from knuckle. Place inner race outside of bearing being removed. Press bearing race from steering knuckle.
Using Axle Hub and Drive Pinion Bearing Tool Set (09608-35014), press new bearing into steering knuckle. Install snap ring in steering knuckle. Using Steering Knuckle Oil Seal Replacer (09608-32010), press in new grease seal until flush with steering knuckle surface. Install dust cover on steering knuckle.
Using steering knuckle oil seal replacer and axle hub and drive pinion bearing tool set, press axle hub into steering knuckle. Install speed sensor rotor. Install a new nut on axle hub and temporarily tighten nut by hand. Completely torque nut once rotor and caliper are on steering knuckle.
Install steering knuckle to lower ball joint. Temporarily tighten 2 retaining bolts. Install steering knuckle to upper arm. Tighten steering knuckle to specification. See TORQUE SPECIFICATIONS (LS400) TABLE at end of article. Tighten 2 lower ball joint bolts to specification. Install brake rotor. Align marks made during disassembly. Install brake caliper. Tighten caliper retaining bolts to specification.
Tighten axle shaft nut to specification. Stake axle nut using a punch. Install grease cap. Install speed sensor on steering knuckle. Install front wheels, and lower vehicle. Tighten lug nuts to specification. Check wheel alignment. See SPECIFICATIONS & PROCEDURES article in the WHEEL ALIGNMENT Section.