Frequently Asked Questions About Freightliner FL70-FL80 Front Axle Air Ride Kits

Will these air ride kits fit my specific FL70 or FL80 model year?

Our front axle air ride kits are designed to fit Freightliner FL70 and FL80 models from 1992 through 2010. However, compatibility can vary based on your truck's front axle rating and suspension configuration. Most kits work with 12,000-14,600 lb front axles. Before ordering, check your VIN plate for your exact front axle model number (typically starts with MFS or FH) to ensure proper fitment. If you're unsure, our tech support team can help verify compatibility with your specific truck.

How difficult is the installation, and what tools do I need?

Installation typically takes 6-8 hours for someone with moderate mechanical experience. You'll need basic hand tools, a floor jack, jack stands, and an air compressor. The most challenging part is usually removing the old leaf springs and aligning the new air bag mounts. Most kits include detailed instructions, but you'll need to drill 4-6 holes in the frame rails for mounting brackets. Professional installation runs $800-1,200 if you prefer not to DIY. No cutting or welding is required for standard installations.

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

A complete front axle air ride kit includes air springs, mounting brackets, air lines, fittings, control valves, and hardware. Most kits also include a basic leveling valve. However, you may need to purchase separately: an air compressor (if your truck doesn't have one), air tank, pressure gauges for the dash, and potentially shock absorbers if yours are worn. Some customers also add an in-cab control system for manual height adjustment, which is sold separately.

How much will this improve my ride quality and what about loaded vs. unloaded performance?

Drivers typically report a 60-70% improvement in ride quality over stock leaf springs. The biggest difference is felt on rough roads and expansion joints. When unloaded, the air ride system provides a notably smoother ride without the harsh bouncing common with leaf springs. When loaded, you can adjust air pressure (typically 40-90 PSI) to maintain proper ride height and handling. Most users find the sweet spot around 60 PSI for everyday driving. The system also reduces cab shake and driver fatigue on long hauls.

What maintenance is required and how long do these systems last?

Air ride systems require minimal maintenance compared to leaf springs. Check air pressure weekly and inspect air lines for leaks or damage during pre-trip inspections. Air bags typically last 7-10 years or 500,000-750,000 miles with proper use. Keep them clean and avoid over-inflation beyond 100 PSI. The most common failure point is air line fittings, which may need occasional tightening. Winter operation requires adding air line antifreeze to prevent moisture freeze-up. Overall maintenance costs are generally lower than replacing worn leaf springs every few years.