1978 Ford Bronco Rear Suspension Diagram - Leaf Spring, Shackle & Torque Specs
Reference · 1978-1979 BroncoAll 79 exploded parts diagrams
Exploded parts breakdown of the rear leaf-spring suspension showing shackle, U-bolts, shock absorber and brackets with torque specifications.
Part of 1978-1979 Ford Bronco Exploded Parts Diagrams
This document is an exploded-view rear suspension diagram showing the rear leaf spring, shock absorber, shackle assembly, and mounting hardware for a Ford truck/Bronco chassis. A main isometric view of the frame and rear axle area identifies the leaf spring, plate, U-bolt (nut torque 85-115 ft. lbs.), and directional arrows (X, Y, Z, W) pointing to three detail views. View X details the shock absorber installation with its upper bracket assembly (nut 20-30 ft. lbs.), lower bracket, and nuts at 40-60 ft. lbs., including a note to install the washer with the concave end facing the attaching nut. View Y shows the front spring hanger bracket (riveted to the frame) and the spring eye nut torqued to 150-190 ft. lbs. View Z shows the rear shackle assembly, installed with the closed side forward, with both shackle nuts torqued to 75-105 ft. lbs. Installation notes state rear springs should be installed in matched pairs, spring leaves should be aligned before torquing U-bolts (.25 inch maximum play allowable at leaf ends), and U-bolts must contact the edges of the spring assembly or axle seat during the U-bolt nut torque operation. The diagram provides all torque specifications needed for rear leaf spring and shock replacement.
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Frequently asked questions
- What is the torque spec for the rear U-bolt nuts?
- The U-bolt nuts are torqued to 85-115 ft. lbs., and the U-bolts must contact the edges of the spring assembly or axle seat during the torque operation.
- What is the torque for the rear shackle nuts?
- Both shackle nuts are torqued to 75-105 ft. lbs., and the shackle assembly must be installed with the closed side forward as shown.
- What are the shock absorber mounting torque specs?
- The upper nut is 20-30 ft. lbs. and the other shock mounting nuts are 40-60 ft. lbs. The washer must be installed with the concave end facing the attaching nut.
- What is the torque for the front spring hanger (bracket) nut?
- The nut at the front bracket/leaf spring eye is torqued to 150-190 ft. lbs.
- Should rear leaf springs be replaced individually?
- No: the notes state rear springs should be installed in matched pairs, and spring leaves should be aligned prior to torquing U-bolts, with.25 inch maximum play allowable at leaf ends.
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