Dorman 946-399 Drive Shaft - Rear

Durable Drive Shaft for Chevrolet and GMC 2500 Series Trucks

The Dorman 946-399 drive shaft is engineered to provide reliable driveline performance for Chevrolet Sierra 2500 and Silverado 2500 HD models, as well as their GMC counterparts. Designed with steel construction and adjustable length, this drive shaft meets the demands of heavy-duty truck applications.

• Constructed from durable steel for strength and longevity
• Compatible with Chevrolet Sierra 2500, Sierra 2500 HD, Sierra 2500 HD Classic, Silverado 2500, Silverado 2500 HD, and Silverado 2500 HD Classic
• Overall length adjustable to ensure proper fitment and alignment
• Includes slip yoke for smooth driveline connection
• Drive shaft length of 73.84 inches with a 3.5-inch diameter and 0.083-inch wall thickness
• Regular grade type suitable for standard heavy-duty use
• Package contains one drive shaft; CV joints and axle nut not included

Technical Details and Construction

The Dorman 946-399 drive shaft is made from steel, providing the necessary rigidity and durability required for heavy-duty truck driveline components. Its 3.5-inch diameter and 0.083-inch wall thickness balance strength with weight considerations. The inclusion of a slip yoke allows for smooth engagement with the transmission or transfer case, while the adjustable overall length feature helps accommodate precise fitment during installation. This drive shaft does not include CV joints or an axle nut, so those components must be sourced separately if needed.

Compatible Vehicles and Applications

This drive shaft is specifically designed for use with Chevrolet and GMC 2500 series trucks, including the Sierra 2500, Sierra 2500 HD, Sierra 2500 HD Classic, Silverado 2500, Silverado 2500 HD, and Silverado 2500 HD Classic models. It is intended for regular grade applications where a reliable, steel drive shaft is required to maintain driveline integrity and performance.

• Replaces worn or damaged drive shafts on compatible Chevrolet and GMC 2500 trucks
• Addresses driveline vibrations and noise caused by shaft wear or imbalance
• Solves issues related to improper shaft length or damaged slip yoke
• Restores proper driveline alignment and reduces drivetrain stress
• Prevents driveline failure due to corrosion or fatigue in original shaft

Installation Notes and Tips

When installing the Dorman 946-399 drive shaft, ensure the vehicle is securely supported and the driveline components are clean and free of debris. The adjustable length feature allows for fine-tuning the shaft to the correct length for your specific vehicle setup. Verify that the slip yoke engages properly with the transmission or transfer case. Since CV joints and axle nuts are not included, inspect and replace these parts as necessary to complete the installation. Proper torque specifications should be followed to avoid driveline issues.

Quality Assurance and Warranty

Dorman manufactures this drive shaft to meet industry standards for durability and performance. The steel construction and precise engineering contribute to a dependable replacement part for Chevrolet and GMC 2500 series trucks. While specific warranty details are not provided here, Dorman typically offers limited warranties on their driveline components to cover defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.