D4TZ4234F Rear Left Drive Axle Shaft | New Steel, 28-Spline, 27-1/4 In. | 1974–1975 Ford Bronco

When a rear axle shaft breaks or cracks on a classic 1974-1975 Ford Bronco, finding a quality new-manufacture replacement — not a worn core rebuild — can be the difference between a truck back on the trail and one sitting in the garage. US Powertrain's 447-1090L is a newly manufactured rear left drive axle shaft built to restore the drivetrain of these iconic first-generation Broncos to full working order. Produced in the United States, this shaft is machined from steel and finished with a rust-resistant coating that helps defend against the corrosion that plagues vintage truck components stored or operated in harsh conditions. The shaft measures 27-1/4 inches in inner length and features 28 inboard splines for proper engagement with the carrier, matching the factory specification for the application. US Powertrain goes beyond simply reproducing OEM dimensions — the engineering team reviews original design specifications and addresses known weak points before manufacturing, delivering a shaft that meets or improves upon original equipment standards. With a 5-lug bolt pattern and regular grade construction suited to the Bronco's rear axle architecture, this shaft installs in place of the original without modification. Note that the axle nut, seal, bearing, and ABS tone ring are not included and should be inspected and replaced as needed during installation. Proudly manufactured in the USA.

US Powertrain New Rear Left Drive Axle Shaft - 28 Spline, 27-1/4 In., Steel, Rust-Resistant | 1974-1975 Ford Bronco

Newly manufactured steel construction — not a remanufactured core — delivers fresh metallurgical integrity free from the fatigue cracks and wear inherent in used axle shafts.

28 inboard splines machined to factory specification ensure full, positive engagement with the differential carrier for reliable torque transfer to the rear wheel.

27-1/4 in. shaft length matches the original equipment dimension for a direct-fit installation on 1974-1975 Ford Bronco rear axles — no cutting, welding, or modification required.

Rust-resistant coating applied to shaft body protects against surface corrosion during storage and service life — especially important for vintage vehicles with extended time between drives.

Engineered with OEM design review — US Powertrain identifies and corrects known factory design flaws during manufacturing, so you receive a shaft that improves on the original specification.

Made in the USA — manufactured domestically for quality oversight and consistency you can count on for a hard-to-find classic truck application.

WARNING: This product can expose you to chemicals including those known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Brand: US Powertrain
UPC: 00810190614396
ABS Tone Ring Included: No
Axle Nut Included: No
Axle Shaft Seal Included: No
Bearing(s) Included: No
Brake Hardware Included: No
Grade Type: Regular
Inboard Spline Quantity: 28
Inner Shaft Length: 27 1/4"
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
Rust Resistant Coating: YES
Shaft Material: Steel
Wheel Bolt Pattern Size: 5
Wheel Nuts Included: NO

Applications:

• 1974-1975 Ford Bronco - PartType: Drive Axle Shaft - Position: Rear Left