Frequently Asked Questions About Kenworth W900A Front Axle Air Ride Kits

Will these air ride kits fit my specific year W900A, and what modifications are needed?

These front axle air ride kits are designed for Kenworth W900A models from 1961-1990. Most kits are direct bolt-on replacements that fit the factory spring perches and axle mounting points. However, trucks with aftermarket suspensions or modified frames may require additional brackets or fabrication. Pre-1970 models sometimes need minor drilling for air line routing. Always verify your truck's front axle weight rating matches the kit specifications before ordering.

What's included in the complete kit, and what additional parts will I need to buy?

A complete front axle air ride kit typically includes air springs, mounting brackets, shock absorbers, height control valves, air lines, and basic fittings. You'll need to purchase separately: an air compressor (if not already equipped), air tanks, pressure gauges, and DOT-approved air brake lines for the connection. Some installations also require a leveling valve linkage kit and additional air fittings depending on your existing air system configuration.

How difficult is the installation, and can I do it myself?

Installation typically takes 6-10 hours for experienced mechanics with proper equipment. You'll need a heavy-duty jack, jack stands rated for commercial trucks, air tools, and basic hand tools. The most challenging aspects are safely supporting the front axle while removing leaf springs and ensuring proper ride height adjustment. While technically possible for skilled DIYers, professional installation is recommended due to safety concerns and the need for precise alignment and ride height calibration.

What's the actual ride improvement, and how does it affect handling?

Drivers report 60-70% reduction in cab bounce and vibration compared to leaf springs, especially noticeable on rough roads and expansion joints. The air ride system provides consistent ride height regardless of load, improving headlight aim and reducing front tire wear. Steering response remains crisp, though some drivers note a slightly different feel during initial break-in. The system significantly reduces driver fatigue on long hauls and protects cab components from vibration damage.

What maintenance is required, and what are common failure points?

Air springs typically last 100,000-150,000 miles with proper maintenance. Check air pressure weekly and inspect for leaks monthly. Common wear items include height control valve linkages (check every 6 months) and shock absorbers (replace every 75,000-100,000 miles). Air spring failure usually results from road debris damage or running with insufficient air pressure. Keep spare air line fittings and a repair kit on hand. Annual professional inspection of mounting bolts and brackets is recommended to prevent loosening from vibration.