Dorman 929-731 Leaf Spring Axle U-Bolt Kit - Rear

Leaf Spring Axle U-Bolt Kit for Rear Suspension

Dorman 929-731 is a leaf spring axle U-bolt kit built for rear suspension service on select Chevrolet and GMC vans. It secures the leaf spring or leaf spring pack to the underside of the axle, helping restore proper clamping force in round-bend applications.

• Steel construction with a semi-gloss black finish
• Bolt grade 8 with fine 5/8 in thread diameter
• Inside length: 8.625 in; inside width: 3.5 in
• Thread length: 3.5 in
• Standard replacement, universal fit design
• Nuts included

Fitment Details

• Fits 1975-1995 Chevrolet G10, rear, Round Bend
• Fits 1975-1995 Chevrolet G20, rear, Round Bend
• Fits 1975-1991 Chevrolet G30, rear, Round Bend
• Fits 1979-1995 GMC G1500, rear, Round Bend
• Fits 1979-1995 GMC G2500, rear, Round Bend
• Fits 1979-1991 GMC G3500, rear, Round Bend
• Fits 1975-1978 GMC G15, rear, Round Bend
• Fits 1975-1978 GMC G25, rear, Round Bend
• Fits 1975-1978 GMC G35, rear, Round Bend
• Fits 1971-1974 GMC G15/G1500 Van, rear, Round Bend
• Fits 1972-1974 GMC G25/G2500 Van, rear, Round Bend
• Fits 1972-1974 GMC G35/G3500 Van, rear, Round Bend

What This Part Helps Address

• Loose or weakened leaf spring-to-axle clamping
• Rear suspension noise caused by worn U-bolts
• Corrosion or fatigue in existing axle hardware
• Incorrect fitment when replacing round-bend U-bolt hardware
• Service needs on Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 rear suspension systems

Installation Notes and Tips

Verify leaf spring dimensions, axle tube shape, and round-bend application details before ordering. Match the inside length, inside width, thread diameter, and thread type to the original hardware for proper fit. Dorman 929-731 is a direct replacement-style solution for rear leaf spring axle mounting service on compatible Chevrolet and GMC vans.

This part cross-references Monroe Shocks & Struts (e.g., 172286) for the same application.

Quality Assurance

Manufactured as a standard replacement part from steel with grade 8 hardware specifications and a semi-gloss black finish. Dorman 929-731 is built for rear suspension applications where secure axle-to-leaf-spring retention is required.