Kenworth W900A Drive Axle Springs & Hangers

Frequently Asked Questions About Kenworth W900A Drive Axle Springs & Hangers

What components are included in this category?

This category covers the suspension parts that support the rear drive axles on a Kenworth W900A, including leaf springs, spring hangers, spring pins, bushings, U-bolts, and related mounting hardware. These parts work together to carry the load of the truck and trailer while allowing the axle to move with the road surface.

How do I know if a spring or hanger will fit my specific W900A?

Fit depends on your truck's suspension configuration, axle spacing, and spring capacity rating, which can vary by model year and how the truck was originally spec'd. Before ordering, check your existing spring's part number, length, arch, and leaf count, and compare axle hanger mounting dimensions against the replacement part. If you're unsure, our sales team can help you cross-reference part numbers to confirm compatibility.

What are common signs that a spring or hanger needs to be replaced?

Common indicators include cracked or broken leaves, sagging ride height, uneven tire wear, a shifted or leaning axle, clunking or popping noises over bumps, and visible rust or metal fatigue around the hanger bracket or pin bushings. Any looseness in the hanger-to-frame connection should be inspected right away, since it affects axle alignment and overall handling.

Can I replace just one spring or hanger, or should I do both sides at once?

While it's possible to replace a single damaged spring or hanger, many shops recommend replacing both sides of an axle at the same time. Springs wear together over time, and mismatched spring capacity or arch on opposite sides can cause the truck to sit unevenly or handle inconsistently. Replacing hangers in pairs also helps maintain even axle alignment.

Do these parts require special tools or a professional to install?

Spring and hanger replacement typically involves heavy components under load, so a hydraulic jack, jack stands, and standard hand tools are usually necessary, along with a way to safely support the axle during the swap. Torque specs for U-bolts and hanger bolts matter for safe operation, so many owners have this work done by a qualified truck repair shop unless they have experience with heavy-duty suspension work.