Frequently Asked Questions About Kenworth T680 Drive Axle Springs & Hangers

Will these drive axle springs and hangers fit my specific T680 model year?

Drive axle springs and hangers for the Kenworth T680 are generally compatible with model years 2013 through current production. However, there can be variations based on your truck's suspension configuration (air ride vs. spring ride) and axle manufacturer (Dana, Meritor, or Hendrickson). Always verify your specific axle model number and suspension type before ordering. You can find this information on your axle's identification tag or in your truck's build sheet.

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

OEM springs are manufactured to Kenworth's exact specifications and typically use higher-grade steel alloys that maintain their spring rate longer. Aftermarket options can vary significantly in quality - premium aftermarket brands often match OEM specs at a lower price, while economy options may use lower-grade steel that can sag prematurely. For trucks under warranty or in heavy-duty applications, OEM is recommended. For older trucks or lighter duty cycles, quality aftermarket springs can provide excellent value.

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

While experienced mechanics can perform this replacement, it requires heavy-duty equipment including a minimum 20-ton hydraulic jack, heavy-duty jack stands rated for commercial trucks, spring compressors, and impact tools capable of handling high-torque fasteners (typically 450-550 ft-lbs). The job also requires proper safety equipment and procedures as compressed springs store significant energy. Most customers find it more practical and safer to have this work performed at a qualified truck service center.

How do I know when my drive axle springs need replacement?

Key indicators include visible cracks or breaks in the spring leaves, uneven truck height from side to side (measure from frame rail to ground), excessive leaning when loaded, broken or missing spring clips, and worn or damaged bushings in the spring eyes or hangers. Additionally, if you notice increased driveline vibration, unusual tire wear patterns, or your truck sitting lower than normal when loaded, have your springs inspected immediately.

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

A complete kit typically includes the multi-leaf spring packs, front hangers, rear hangers, spring pins, and bushings. However, you'll often need to purchase separately: U-bolts (which should always be replaced, never reused), spring eye bolts, shackle pins, and any alignment shims. Some kits include new bushings while others require you to reuse existing ones - check the product description carefully. Budget for additional hardware as corroded fasteners often need cutting during removal.