Frequently Asked Questions About Freightliner M2 Business Steer Axle Springs & Hangers

What are the weight capacity ratings for M2 Business Class front springs, and how do I know which one I need?

Freightliner M2 steer axle springs typically range from 12,000 to 20,000 lbs capacity. To determine your specific needs, check the door jamb sticker for your front GAWR (Gross Axle Weight Rating) or look at your existing spring's part number stamped on the main leaf. Common capacities include 12,000 lbs for lighter duty M2 106 models and up to 16,000-20,000 lbs for heavier M2 112 applications. If you're unsure, provide us with your VIN and we can help identify the correct capacity.

Will these springs and hangers fit my specific year M2, and are there differences between model years?

Most M2 Business Class springs and hangers fit models from 2003 to present, but there are important variations. The 2003-2007 models often use different hanger configurations than 2008+ models. Additionally, M2 106 and M2 112 models may require different components despite looking similar. Always verify fitment using your VIN or by measuring your current spring eye-to-eye distance (typically 26", 28", or 30" for M2 models).

Can I install these springs myself, and what special tools are required?

While experienced mechanics can perform this installation, it requires heavy-duty equipment including a proper jack system rated for commercial trucks, spring compressors, and torque wrenches capable of 250-450 ft-lbs. The job typically takes 4-6 hours per side. Critical safety note: improperly compressed springs can cause serious injury. Many customers find it more cost-effective to have a commercial truck shop perform the installation, which typically runs $300-500 in labor.

What's the difference between OEM and aftermarket springs, and how long should they last?

OEM Freightliner springs use specific steel alloys and heat treatment processes that typically last 200,000-300,000 miles under normal conditions. Quality aftermarket options from manufacturers like Dayton Parts or Triangle Suspension often match OEM specifications at 20-30% less cost. Avoid economy imports that may use inferior steel and lack proper shot-peening, as these often sag within 50,000 miles. Look for springs that meet or exceed OEM specifications for tensile strength and include a minimum 1-year warranty.

Why are my springs sagging unevenly, and should I replace hangers at the same time?

Uneven sagging usually indicates worn hangers, bushings, or shackles rather than just the springs themselves. When one side sits lower, inspect hanger brackets for cracks and bushings for deterioration. We strongly recommend replacing hangers, bushings, and shackle pins when doing springs - the additional parts cost is minimal compared to redoing the job later. A complete refresh typically includes springs, hangers, bushings, shackle kits, and new U-bolts, ensuring proper alignment and preventing premature wear.