Volvo VNL Gen II Leaf Springs, Hangers & Acc.

Frequently Asked Questions About Volvo VNL Gen II Leaf Springs, Hangers & Acc.

What year models are these leaf springs compatible with?

These leaf springs and hangers are specifically designed for Volvo VNL Generation II trucks, which covers model years 2018 to present. This includes VNL 300, VNL 400, VNL 640, VNL 740, VNL 760, and VNL 860 models. Always verify your specific VIN and axle configuration before ordering, as some specialty configurations may have different requirements.

What's the difference between OEM and aftermarket leaf springs for my VNL?

OEM leaf springs are manufactured to Volvo's exact specifications and typically carry a higher price point but ensure perfect fit and warranty compliance. Aftermarket options from reputable manufacturers like Dayton Parts or Triangle Suspension offer comparable quality at 20-40% less cost. Key differences include spring arc measurements, bushing materials, and warranty terms. Most aftermarket springs meet or exceed OEM load ratings but may have slightly different ride characteristics.

Do I need special tools or expertise to replace leaf springs and hangers?

Leaf spring replacement requires heavy-duty jack stands, a floor jack capable of supporting axle weight, proper spring compressors, and torque wrenches for proper bolt specifications. The job typically takes 4-6 hours per axle for experienced technicians. Critical safety concerns include proper support of the frame and axle during removal, correct U-bolt torque sequences (typically 300-450 ft-lbs), and ensuring proper pinion angle after installation. We strongly recommend professional installation unless you have commercial truck suspension experience.

How do I know when my leaf springs need replacement?

Common indicators include visible cracks in spring leaves, broken or shifted center bolts, excessive sagging (more than 2 inches from original ride height), separated leaves, or worn eye bushings causing lateral movement. Uneven tire wear, harsh ride quality, and axle misalignment are also symptoms. During pre-trip inspections, look for rust between leaves, missing spring clips, or oil contamination from leaking shocks. Replace springs in axle pairs to maintain proper balance and alignment.

What's included in a complete leaf spring kit versus individual components?

Complete kits typically include the leaf spring assembly, new bushings, center bolts, U-bolts with nuts and washers, and spring pins. Some premium kits also include new hangers, shackles, and mounting hardware. Individual components allow targeted repairs but may not address related wear issues. For trucks over 500,000 miles, complete kits often provide better value as hangers and shackles typically wear at similar rates to the springs themselves.