Dorman 929-821 Leaf Spring Axle U-Bolt Kit - Rear

Dorman 929-821 Leaf Spring Axle U-Bolt Kit

Dorman 929-821 is a specific-fit leaf spring axle U-bolt kit for rear suspension applications. It secures the leaf spring or leaf spring bundle to the underside of the axle on select heavy-duty Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD models.

Key Features

• Steel construction with a semi-gloss black finish
• Grade 8 bolt specification for demanding suspension service
• Fine 3/4 in thread diameter with 5.5 in thread length
• Inside dimensions: 13.25 in length and 3.25 in width
• Specific-fit design for rear square-bend applications
• Nuts included

Detailed Description

This Dorman leaf spring axle U-bolt kit is built to clamp the leaf spring assembly securely to the axle housing, helping maintain proper suspension location and clamping force. The Dorman 929-821 is a standard replacement part made from steel with a semi-gloss black coating, and it uses fine-thread 3/4 in hardware with Grade 8 strength. It cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Compatible With 2011-2018 Chevrolet Silverado 2500 HD rear square bend, 2011-2018 Chevrolet Silverado 3500 HD rear square bend, 2011-2018 GMC Sierra 2500 HD rear square bend, and 2011-2018 GMC Sierra 3500 HD rear square bend. For buyers searching for a rear leaf spring U-bolt kit for Chevrolet Silverado 2500 HD or GMC Sierra 3500 HD, this part number 929-821 matches the listed fitment details.

Common Issues This Part Can Address

• Loose or weakened leaf spring-to-axle clamping
• Corroded or damaged U-bolts during suspension service
• Incorrect hardware size during rear spring repair
• Replacement needs after axle or leaf spring maintenance
• Fitment concerns on square-bend rear suspension setups

Installation Notes and Tips

Verify leaf spring dimensions, axle configuration, and square-bend application details before installation. Match the inside length, inside width, thread diameter, and thread type to the vehicle’s suspension requirements. Follow the vehicle manufacturer’s torque specifications and recheck fastener torque after initial use.

Quality Assurance

Dorman manufactures replacement suspension hardware to match specific application requirements. Part number 929-821 is built as a standard replacement for the listed rear heavy-duty truck fitments.