Frequently Asked Questions About Kenworth W900A Shock Absorbers

Will these shock absorbers fit my specific year Kenworth W900A, and what about W900B or W900L models?

Most shock absorbers listed for the W900A are designed to fit models from 1961-1987. However, fitment can vary based on your truck's suspension configuration (spring or air ride) and whether it has been modified. The W900B (1987-1989) and W900L (1989-present) often use different mounting points and lengths. Always check the product specifications for your exact year and verify the mounting style (eye-to-eye, stem-to-stem, or eye-to-stem) matches your current setup.

What's the difference between standard and heavy-duty shock absorbers, and which do I need?

Standard shocks work well for highway driving and lighter loads, typically rated for trucks under 80,000 lbs GVW. Heavy-duty shocks feature larger piston diameters, stronger seals, and heavier gauge steel construction, making them ideal for off-road use, frequent heavy hauling, or vocational applications. If you regularly haul maximum loads, operate on rough terrain, or notice excessive bouncing with standard shocks, heavy-duty options will provide better control and longevity.

Can I install these shock absorbers myself, and what tools will I need?

Installation typically takes 2-3 hours for someone with basic mechanical skills. You'll need a floor jack and jack stands, socket set (usually 3/4" to 1-1/4"), torque wrench, penetrating oil for rusty bolts, and potentially a spring compressor for some applications. The upper mounts can be challenging to access, especially on the front axle. Many drivers report needing to remove the wheel and inner fender liner for better access. Always replace shocks in pairs per axle for balanced performance.

How do I know when my W900A shocks need replacement?

Common signs include oil leaking from the shock body, excessive bouncing after hitting bumps (more than 2-3 oscillations), nose diving during braking, uneven tire wear, or a harsh, jarring ride quality. Visually inspect for bent shafts, damaged bushings, or loose mounting hardware. Most quality truck shocks last 150,000-200,000 miles under normal conditions, but severe service applications may require replacement every 75,000-100,000 miles.

What length shock absorber do I need, and can I upgrade to longer travel shocks?

Stock W900A front shocks typically measure 20-21 inches extended and 12-13 inches compressed, while rears are usually 26-28 inches extended and 16-17 inches compressed. Measure your current shocks at full extension and compression before ordering. Longer travel shocks can improve ride quality but may require suspension modifications to prevent over-extension. Never exceed the manufacturer's recommended travel specifications, as this can cause premature failure and potentially dangerous handling characteristics.