23445894 New Rear Drive Axle Shaft — DRW, 30-Spline | 2015–2021 Chevy Silverado 3500 HD / GMC Sierra 3500 HD Cab & Chassis

When a rear axle shaft fails on a heavy-duty work truck, downtime is not an option. The US Powertrain rear drive axle shaft (PN 447-3341) is purpose-built for dual-rear-wheel applications on the 2015-2021 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD Cab & Chassis, delivering the strength and dimensional accuracy these demanding platforms require. Engineered from high-grade steel with a rust-resistant coating applied to the shaft body, this replacement axle shaft is built to withstand the torque loads, payload demands, and environmental exposure that commercial and fleet operators put on their drivetrains every day. At 40-3/8 inches from the inside of the flange to the end of the splines, this shaft matches the OE length specification precisely, ensuring correct engagement with the differential side gear and proper bearing seat positioning without modification. The 30-spline inboard count and 8-hole, 8-lug flange configuration are engineered to match the factory drivetrain interface, making installation a direct, straightforward replacement. US Powertrain goes beyond simple replication — their engineering team evaluates original equipment designs and incorporates improvements where OE weaknesses are identified, so you are not just replacing what failed, you are installing something better. Backed by a 1-year parts warranty, this axle shaft is the right solution for restoring full drivetrain integrity to your heavy-duty truck.

2011-2019 GMC/CHEVY Silverado/Sierra 3500 with DRW cab chassis WITHOUT wide track, WILL NOT FIT PICKUP APPLICATIONS
Axle Shaft
Rear Drive Axle Shaft - DRW, 30-Spline, 40-3/8 In. Length, for Chevy/GMC 3500 HD

High-grade steel construction delivers the tensile strength and torsional rigidity required for dual-rear-wheel heavy-duty drivetrain loads and commercial payload demands.

Rust-resistant coating on the shaft body protects against corrosion and surface degradation in harsh environments, extending service life under real-world working conditions.

30 inboard splines and precise 40-3/8 in. flange-to-spline length match OE specifications exactly, ensuring correct differential engagement and proper bearing seat positioning.

8-hole, 8-lug flange configuration matches factory DRW hub interface — no adapter required, no wheel stud rework needed.

Backed by a 1-year parts warranty, providing documented assurance for fleet managers, shop owners, and owner-operators investing in drivetrain restoration.

WARNING: This product contains a chemical known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov

This shaft measures 40-3/8 in. from the inside of the flange to the end of the splines. Confirm this matches your axle housing measurement before installation to avoid an incorrect fitment.

No cutting, welding, or modification is required. This is a direct bolt-in replacement shaft using the existing mounting points and differential interface of the factory axle assembly.

Brand: US Powertrain
UPC: 00810190616475
ABS Tone Ring Included: No
Axle Nut Included: No
Axle Shaft Seal Included: No
Bearing(s) Included: No
Brake Hardware Included: No
CV Joints Included: No
Grade Type: Regular
Inboard Spline Quantity: 30
Inner Shaft Length: 40 3/8" FROM INSIDE OF FLANGE TO END OF SPLINES
Mounting Hole Quantity: 8
Prop 65 - Long Label: This product may contain a chemical known to the state of California to cause cancer or birth defects. www.p65warnings.ca.gov
Prop 65 - Short Label: WARNING: Cancer – www.p65warnings.ca.gov
Prop 65 Y/N: Y
Retainer Included: No
Rust Resistant Coating: YES
Shaft Material: Steel
Universal Joints Included: No
Wheel Bolt Pattern Size: 8 lug
Wheel Nuts Included: NO
Wheel Studs Included: No

Interchange:

• General Motors: 23445894

Applications:

• 2015-2021 Chevrolet Silverado 3500 HD - PartType: Drive Axle Shaft - Position: Rear
• 2015-2021 GMC Sierra 3500 HD - PartType: Drive Axle Shaft - Position: Rear