Peterbilt 389 Glider Drive Axle Springs & Hangers

Frequently Asked Questions About Peterbilt 389 Glider Drive Axle Springs & Hangers

What is the difference between the springs and the hangers in this category?

The springs are the leaf spring assemblies that support the weight of the drive axles and absorb road shock, while the hangers are the mounting brackets that attach those springs to the frame rail. Both work together as part of the rear suspension system, and they are commonly replaced together since wear on one often affects the other.

Will these parts fit my specific Peterbilt 389 glider kit?

Fitment can vary depending on the suspension setup used on your particular glider build, including axle spacing, spring capacity, and frame configuration. Before ordering, check the part description for listed specifications and compare them to your truck's suspension setup, or contact our parts team with your VIN or build sheet so we can confirm the correct match.

How do I know if my springs or hangers need to be replaced?

Common signs include visible cracks or rust in the spring leaves, sagging ride height, uneven tire wear, a rough or bouncy ride, or clunking noises from the rear suspension when going over bumps. Bent or worn hangers may also cause the axle to sit unevenly or allow excessive play in the suspension.

Are these springs and hangers rated for heavy-duty or overweight loads?

Load capacity depends on the specific spring and hanger set you choose, as different parts are built for different weight ratings. Review the listed capacity for each product to make sure it matches or exceeds the demands of your typical hauling weight, and avoid exceeding the rated capacity of the suspension components.

Should I replace drive axle springs and hangers myself or have a shop install them?

Replacing these components involves working under a loaded truck, removing fasteners under tension, and properly aligning the axle, which requires the right tools and safety equipment. If you have experience with heavy-duty suspension work and access to a shop lift or pit, it can be done in-house, but many owner-operators choose to have a qualified diesel shop handle installation to ensure proper torque specs and alignment.