Dorman 929-770 Leaf Spring Axle U-Bolt Kit - Rear

Dorman 929-770 Leaf Spring Axle U-Bolt Kit

Dorman 929-770 is a leaf spring axle U-bolt kit for rear suspension applications that secure the leaf spring or leaf spring bundle to the underside of the axle. It is built as a standard replacement with steel construction, fine threads, and a semi-gloss black finish for a clean, service-ready appearance.

Compatible with select Chevrolet P30 and GMC P3500 rear applications, this kit supports direct replacement needs where the original axle-to-spring clamping hardware has worn, stretched, or corroded. The Dorman 929-770 part number is commonly searched for rear leaf spring U-bolt replacement on Chevrolet P30 and GMC P3500 chassis.

Key Features

• Steel construction for suspension hardware service
• Semi-gloss black finish
• Grade 8 bolt specification
• Fine thread design with 3/4 in thread diameter
• Inside length: 12.625 in
• Inside width: 2.563 in
• Specific fit replacement for select rear applications
• Nuts included

Detailed Description

This leaf spring axle U-bolt kit is engineered to clamp the leaf spring assembly securely to the axle housing, helping maintain proper spring-to-axle location in rear suspension service. The Dorman 929-770 uses steel hardware with Grade 8 strength and fine threads for a standard replacement approach that matches the application requirements of select medium-duty chassis and trailer-style suspension setups. If you are replacing rear leaf spring axle U-bolts on a Chevrolet P30 or GMC P3500, verify leaf spring dimensions, inside length, inside width, and thread specifications before ordering.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Loose or worn leaf spring-to-axle clamping hardware
• Corrosion on rear suspension U-bolts
• Incorrect fitment from mismatched leaf spring dimensions
• Loss of clamping force at the axle spring seat
• Service replacement needs on Chevrolet P30 and GMC P3500 rear suspension

Installation Notes and Tips

Confirm the leaf spring bundle dimensions, inside length, inside width, thread diameter, and thread length before installation. Match the rear application and note the semi-round bend configuration listed for the supported vehicles. Inspect related suspension components, spring seats, and axle surfaces during service to ensure the new hardware seats correctly.

Quality Assurance

Dorman supplies standard replacement suspension hardware for repair applications where correct dimensions and fitment matter. The Dorman 929-770 part number is listed for specific rear applications on Chevrolet P30 and GMC P3500 chassis, and the fitment data should be matched to the vehicle and suspension configuration before installation.