Freightliner Classic Leaf Springs, Hangers & Acc.

Frequently Asked Questions About Freightliner Classic Leaf Springs, Hangers & Acc.

Will these leaf springs fit my specific year Freightliner Classic model?

Our leaf springs are designed to fit Freightliner Classic models from 1990 through 2010. However, there are variations between model years, particularly in spring eye dimensions and center bolt patterns. For 1990-1999 models, most use a 2.5-inch eye with 3/4-inch pins. The 2000-2010 models typically use 3-inch eyes with 7/8-inch pins. Always verify your existing spring specifications before ordering, as some models may have factory variations or previous modifications.

What's the difference between OEM and aftermarket leaf springs in terms of quality and lifespan?

OEM leaf springs typically use higher-grade spring steel (5160H) and undergo more rigorous heat treatment processes, resulting in an average lifespan of 200,000-300,000 miles under normal conditions. Aftermarket options vary significantly - premium aftermarket springs can match OEM quality at 20-30% less cost, while economy options may only last 100,000-150,000 miles. Look for springs with shot-peened surfaces and proper arch specifications. Avoid springs without clear steel grade markings or those significantly lighter than OEM weight.

Do I need to replace hangers and bushings when installing new leaf springs?

While not always mandatory, replacing hangers and bushings during spring installation is highly recommended and can prevent premature spring failure. Worn hangers can cause improper spring alignment, leading to accelerated wear and potential breakage. If your hangers show any cracks, elongated bolt holes, or rust damage exceeding surface level, replacement is necessary. New polyurethane bushings are preferred over rubber for longevity, though they may transmit slightly more road vibration.

What tools and equipment do I need for DIY installation?

Essential tools include a 10-ton minimum jack and jack stands rated for commercial vehicles, a 3/4-inch drive socket set with 1-1/8 through 1-1/2 inch sockets, a heavy-duty torque wrench capable of 450 ft-lbs, and a suitable spring compressor if working with helper springs. You'll also need penetrating oil for stubborn bolts and anti-seize compound for reassembly. Installation typically takes 3-4 hours per side for experienced mechanics. Many customers report that having an impact wrench rated for at least 1,000 ft-lbs breaking torque saves significant time.

How can I tell if my leaf springs need replacement versus just re-arching?

Measure the arch height at the center bolt - if it's sagged more than 2 inches from specification but shows no cracks or separated leaves, re-arching may be viable. However, look for these replacement indicators: visible cracks anywhere on the leaves, separation between leaves when unloaded, broken center bolts, or leaves that have shifted out of alignment. Also check for thickness loss - leaves worn below 90% of original thickness should be replaced. Re-arching typically costs 40-50% of new springs but only restores about 70% of original capacity.