Frequently Asked Questions About International S1700-S1900 Drive Axle Springs & Hangers

Will these springs and hangers fit my specific International S-Series truck model year?

These drive axle springs and hangers are designed for International S1700, S1800, and S1900 models typically manufactured from 1979 through 2001. However, there can be variations based on your truck's specific configuration, GVWR, and whether it has single or tandem axles. We recommend checking your vehicle's VIN plate or calling us with your truck's serial number to ensure proper fitment before ordering.

What's the difference between OEM and aftermarket springs, and which should I choose?

OEM springs match original factory specifications exactly, while quality aftermarket options often use improved steel alloys and manufacturing processes. Both options we carry meet or exceed DOT standards. OEM springs are ideal if you need to maintain exact factory ride height and load capacity. Aftermarket springs can offer better value and sometimes improved durability, especially for trucks that see heavy daily use or frequent overloading.

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 spring compressors, proper jack stands rated for commercial trucks, and impact tools capable of handling large suspension bolts. The job typically takes 4-6 hours per axle. Safety is critical - improperly compressed springs can cause serious injury. Most customers choose professional installation, which runs $300-500 per axle at most truck shops.

How do I know when my springs need replacement versus just new bushings?

Look for these signs: sagging ride height (measure from frame to ground and compare sides), visible cracks in spring leaves, separated or shifted leaves, or excessive rust between leaves. If springs are compressed unevenly or the truck leans, replacement is needed. Sometimes worn shackle bushings or hangers cause similar symptoms - inspect the entire assembly. Minor surface rust is normal, but flaking rust or pitting indicates replacement time.

What's included in a complete spring and hanger kit, and what else might I need?

Complete kits typically include the multi-leaf spring pack, front spring hanger, rear spring hanger or shackle assembly, and mounting hardware. You may also need new U-bolts (sold separately) as these should be replaced whenever springs are changed. Consider adding new shock absorbers and bushings at the same time since labor costs overlap. Some installations require new spring pins or alignment shims, depending on your truck's condition.