Ford F57Z-3A360-B Adjustment Arm

To remove and install the radius arm, first raise the front of the vehicle and secure it with jack stands under the frame, placing a jack under the axle. Disconnect the lower end of the shock absorber from the shock lower bracket on 1983-89 vehicles or the lower stud on 1990 vehicles, then remove the front spring. Next, take out the spring lower seat and stud from the radius arm, followed by the bolts that attach the radius arm to the axle and front bracket. Remove the nut, rear washer, and insulator from the rear side of the radius arm rear bracket, then take out the radius arm and remove the inner insulator and retainer from the radius arm stud. For installation, position the front end of the radius arm from the bracket to the axle, installing the retaining bolts and stud in the bracket finger tight. Place the retainer and inner insulator on the radius arm stud, inserting the stud through the radius arm rear bracket. Install the rear washer, insulator, and nut on the arm stud at the rear side of the arm rear bracket, tightening the nut to 80-120 ft. lbs. Tighten the stud to 190-230 ft. lbs., the front bracket to axle bolts to 37-50 ft. lbs., and the lower bolt and washer to 190-230 ft. lbs. Finally, install the spring lower seat and spring insulator on the radius arm, ensuring the hole in the seal aligns with the arm to axle bolt, then tighten the axle pivot bolt to 120-150 ft. lbs. Install the front spring and connect the lower end of the shock absorber to the lower bracket on 1983-89 vehicles or to the stud on 1990 vehicles, torquing the retaining nut to 42-72 ft. lbs.

To remove and install the front suspension components, first raise the front of the vehicle and place jack stands under the frame, then position a jack under the axle. Disconnect the lower end of the shock absorber from the lower bracket by removing the bolt and nut. Next, remove the front spring by loosening the axle pivot bolt, then take off the spring lower seat from the radius arm, followed by removing the bolt and nut that attach the radius arm to the axle and front bracket. Remove the nut, rear washer, and insulator from the rear side of the radius arm rear bracket, and then take the radius arm out of the vehicle, also removing the inner insulator and retainer from the radius arm stud. For installation, position the front end of the radius arm to the axle, install the attaching bolt from underneath, and secure the nut finger tight. Place the retainer and inner insulator on the radius arm stud and insert it through the radius arm rear bracket. Install the rear washer, insulator, and nut on the arm stud at the rear side of the arm rear bracket, tightening the nut to 81-120 ft. lbs. Tighten the nut on the radius arm-to-axle bolt to 160-220 ft. lbs. Next, install the spring lower seat and spring insulator on the radius arm, ensuring the hole in the seat aligns with the arm-to-axle bolt, and then install the front spring. For vehicles from 1983-89, connect the lower end of the shock absorber to the lower bracket on the radius arm using the attaching bolt and nut, with the bolt head facing the tire, and tighten the nut to 48-68 ft. lbs. For 1990 vehicles, connect the lower end of the shock absorber to the stud on the radius arm with the retaining nut, torquing it to 40-63 ft. lbs.

Install the spring assembly.

From underneath the axle, install the attaching bolt and a new nut. Tighten the nut only finger tight at this time.