Kenworth T660 Drive Axle Springs & Hangers

Frequently Asked Questions About Kenworth T660 Drive Axle Springs & Hangers

What is the difference between drive axle springs and hangers, and do I need both?

Drive axle springs (leaf springs) support the weight of the truck and axle while absorbing road shock, while spring hangers are the mounting brackets that attach the springs to the frame. If your hangers are cracked, bent, or worn at the pivot points, replacing them along with your springs is usually recommended since worn hangers can cause premature spring wear and affect ride height and axle alignment.

How do I know if my springs or hangers need to be replaced?

Common signs include visible cracks in the hanger castings, excessive play or looseness at the pivot bushings, uneven ride height, leaning to one side, or unusual noises like clunking over bumps. A sagging spring pack or broken leaf is also a clear indicator that replacement parts are needed.

Will these springs and hangers fit my specific Kenworth T660 configuration?

Fitment can vary based on your truck's axle configuration, GVW rating, and suspension setup, so it's important to verify part numbers against your truck's specs or VIN before ordering. If you're unsure, our team can help confirm compatibility so you get the correct springs and hangers for your specific build.

Can I install these parts myself, or should I have a professional do it?

Replacing drive axle springs and hangers involves lifting and supporting a heavily loaded part of the truck, precise torque specs, and proper alignment of suspension components. While experienced fleet mechanics may handle this in-house, most owner-operators choose to have this work done by a qualified technician to ensure everything is installed safely and correctly.

What materials are these springs and hangers made from, and how long should they last?

Drive axle springs are typically made from heat-treated alloy steel for durability under heavy loads, while hangers are usually cast or forged steel components designed to withstand constant stress and vibration. Lifespan depends heavily on load conditions, road surfaces, and maintenance, so regular inspection is the best way to catch wear before it leads to bigger issues.