Frequently Asked Questions About Peterbilt 330/335/337 Drive Axle Springs & Hangers
Will these springs and hangers fit my specific Peterbilt model year?
Our drive axle springs and hangers are designed to fit Peterbilt 330, 335, and 337 models from 2005 through current production years. However, there can be variations based on your truck's specific configuration, including wheelbase and suspension type. We recommend checking your OEM or calling our technical support team at 1-888-875-2425 with your truck's details to ensure proper fitment before ordering.
What's the difference between OEM and aftermarket springs, and which should I choose?
OEM springs are manufactured to exact factory specifications and typically use the same steel alloys and heat treatment processes as your original equipment. Aftermarket options often provide comparable quality at a lower price point, with some offering upgraded materials or heavier duty ratings. For standard applications, quality aftermarket springs perform excellently. If you're hauling at maximum capacity regularly or need exact OEM specifications for warranty purposes, we recommend sticking with OEM parts.
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 equipment including a floor jack rated for commercial vehicles, proper jack stands, spring compressors, and torque wrenches capable of 300+ ft-lbs. The job typically takes 4-6 hours per axle. Safety is critical when working with heavy suspension components under tension. If you don't have access to proper equipment or experience with heavy truck suspension, we strongly recommend professional installation.
How do I know when my springs or hangers need replacement?
Common signs include: visible cracks or breaks in spring leaves, excessive rust or corrosion, uneven ride height between sides, unusual tire wear patterns, squeaking or groaning noises during suspension movement, and worn or elongated hanger bolt holes. During inspection, look for gaps between spring leaves when unloaded, as this indicates fatigue. Springs should be replaced in pairs to maintain proper balance and handling.
What weight capacity springs do I need for my application?
Spring capacity depends on your typical load requirements and gross vehicle weight rating (GVWR). Standard Peterbilt 330/335/337 models typically use springs rated between 12,000-20,000 lbs per axle. Check the identification tag on your existing springs or your door jamb sticker for current ratings. If you frequently haul at capacity or have added equipment like service bodies or cranes, consider upgrading to the next capacity level for improved durability and reduced maintenance.
