Frequently Asked Questions About Freightliner FL70-FL80 Steer Axle Springs-Hangers

What years and models are these steer axle springs and hangers compatible with?

These steer axle springs and hangers are designed specifically for Freightliner FL70 and FL80 models manufactured between 1990 and 2007. They fit both single and tandem axle configurations. For FL70 models with GVWR ratings from 19,500 to 26,000 lbs and FL80 models with GVWR ratings from 26,001 to 33,000 lbs. Always verify your specific axle manufacturer (typically Meritor, Dana, or Hendrickson) before ordering, as mounting dimensions can vary.

What are the most common signs that my steer axle springs or hangers need replacement?

Look for these warning signs: uneven tire wear on the front axle, vehicle pulling to one side, visible cracks or breaks in the spring leaves, excessive rust or corrosion on hangers, loose or worn bushings causing metal-to-metal contact, or a noticeable lean when the truck is parked on level ground. Additionally, if you hear squeaking or grinding noises from the front suspension during turns or over bumps, inspection is recommended.

Can I install these springs and hangers myself, or do I need special tools?

While experienced mechanics can perform this installation, it requires heavy-duty equipment including a minimum 20-ton jack, heavy-duty jack stands rated for commercial vehicles, spring compressors, and torque wrenches capable of 250-450 ft-lbs. The job typically takes 4-6 hours per side. Critical safety note: improper installation can lead to catastrophic failure. Most customers opt for professional installation at a qualified heavy-duty truck service center to ensure proper alignment and torque specifications are met.

What is the weight capacity difference between standard and heavy-duty spring options?

Standard springs for FL70 models typically support 6,000-7,000 lbs per spring, while heavy-duty options can handle 8,000-9,000 lbs. For FL80 models, standard springs support 8,000-10,000 lbs, with heavy-duty versions rated up to 12,000 lbs per spring. Your choice depends on your typical load weight and application. Vocational trucks, dump trucks, and those frequently carrying maximum loads should opt for heavy-duty springs to prevent premature wear and maintain proper ride height.

Are aftermarket springs and hangers as reliable as OEM parts?

Quality aftermarket springs and hangers from reputable manufacturers like Dayton Parts, Triangle Suspension, and Hutchens meet or exceed OEM specifications. They use the same 5160H spring steel and undergo similar heat treatment processes. The main differences are typically price (aftermarket parts cost 30-40% less) and availability (aftermarket parts are often in stock versus OEM parts which may have longer lead times). Look for parts that meet SAE J510 standards and come with at least a 1-year warranty for best results.