Freightliner FL70-FL80 Leaf Springs, Hangers & Acc

Frequently Asked Questions About Freightliner FL70-FL80 Leaf Springs, Hangers & Acc

What years and models of FL70/FL80 trucks are these leaf springs compatible with?

Our leaf springs and hangers are designed to fit Freightliner FL70 and FL80 models from 1994 through 2007. However, compatibility can vary based on your truck's specific configuration, including GVWR rating and suspension type. We recommend checking your VIN or calling our technical support team at 1-888-875-2425 with your truck's specifications to ensure proper fitment before ordering.

What weight capacity leaf springs do I need for my FL70/FL80?

The correct leaf spring capacity depends on your truck's GVWR and typical load requirements. FL70 models typically use springs rated between 12,000-17,500 lbs per axle, while FL80 models often require 18,000-23,000 lb ratings. Check the stamping on your existing springs or the door jamb sticker for your truck's weight ratings. Upgrading to higher capacity springs requires matching shackles and hangers to handle the increased load.

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

While leaf spring replacement is possible for experienced mechanics, it requires heavy-duty jack stands, a floor jack capable of supporting your truck's weight, spring compressors, and proper torque wrenches. The job typically takes 4-6 hours per axle. Critical safety concerns include properly supporting the frame and axle during installation. Many customers find it more cost-effective to have a qualified suspension shop perform the installation, which typically runs $300-500 per axle in labor.

What's the difference between OEM-style and heavy-duty aftermarket leaf springs?

OEM-style springs match your truck's original specifications and ride characteristics, using standard 2.5-inch wide leaves with factory spring rates. Heavy-duty aftermarket options often feature 3-inch wide leaves, additional leaf count, or progressive rate designs that provide 15-25% more load capacity. Heavy-duty springs may create a slightly firmer ride when unloaded but offer better stability and longevity under frequent heavy loads. Consider your typical hauling needs when choosing.

How do I know when to replace hangers and shackles along with leaf springs?

Inspect hangers and shackles for cracks, elongated bolt holes, or excessive wear whenever replacing springs. If bushings show deterioration, metal components have visible rust pitting, or you notice any play in the connections, replacement is recommended. Since labor is the major cost in spring replacement, installing new hangers and shackles (typically $40-80 per set) during spring service can prevent premature spring failure and avoid repeating the labor expense within the next 50,000 miles.