Description

Moser rear end Rear Upper A-Arm Kit 1958 Impala, El Camino, Bel Air part # TBC-58M

Global West Suspension manufactures a 1958 Impala rear upper A-arm and adjustable mount for pinion angle.

The rear upper A-arm controls two important aspects of the rear suspension. First, it controls the lateral location of the rear end in the chassis. Second, it controls the pinion angle.

There were several design flaws in the original suspension because the stock pinion angle was adjusted by a rubber offset bushing. As time progressed, the rubber bushing would loosen when the driver went over bumps, thus distorting the pinion angle. Even with repairs, the angle’s position would eventually shift again.

The design was only used for one year (1958). The following year (1959), the Impala went to an upper trailing arm for adjusting the pinion angle and then used a panhard rod for controlling the lateral location of the rear end. Technically the 1958 upper arm had better lateral control but terrible pinion angle control.

Global West part number TBC-58M for a Moser rear end upgrades the 1958 upper A-arm to a tubular design and substitutes the rubber bushing to a spherical bearing; the new rear end mount, which houses the bearing, replaces the factory mount with a spider-like bracket. The bracket/mount permanently sets the pinion angle with shims, and the bearing allows the differential to pivot properly without deflection.

The kit can be used on a  Moser 9 inch Ford differential. Installation requires welding to the differential housing.

For more information, watch the video above.

Premium Rear Upper Control Arm Kit for 1958 Impala, El Camino, and Bel Air

Quality is at the heart of our 1958 Impala, El Camino, and Bel Air Rear Upper Control Arm Kit (Part Number: TBC-58M). Crafted with precision, this kit not only enhances the performance of your Moser rear end but also addresses the inherent flaws of the original suspension design. Our commitment to excellence means you can trust that each component is built to last. Should you need assistance, our dedicated customer support team is just a call away, ready to help you with any questions or concerns. To make your installation process as smooth as possible, we provide comprehensive instruction sheets and detailed video tutorials, ensuring you have all the resources you need at your fingertips. Explore more of our offerings, including 1958-64 Chevy Parts and 1958-64 Impala Panhard Rod, to further enhance your classic ride.