Upgrade your Peterbilt 387 with heavy-duty leaf springs, hangers, and many more! The extreme demands that the design of these parts allows enable a smooth and comfortable ride without losing steering performance in your truck. From performance and comfort to style, our quality components are in demand by both fleets and owner-operators. Get the most out of your rig with the best drive ever!
Frequently Asked Questions About Peterbilt 387 Leaf Springs, Hangers & Acc.
What years and models are these leaf springs compatible with?
Our Peterbilt 387 leaf springs are designed specifically for model years 2000-2010. These components are engineered to match OEM specifications for all 387 configurations, including day cab and sleeper models. Always verify your truck's VIN and suspension configuration before ordering, as some specialty applications may require different specifications.
What's the difference between OEM and aftermarket leaf springs for my 387?
OEM leaf springs are manufactured to exact Peterbilt specifications using the same steel grades and heat treatment processes as factory parts. Aftermarket options typically use similar materials but may vary in spring rate or arch design. Our aftermarket springs meet or exceed OEM durability standards while often providing better value. Most drivers report no noticeable difference in ride quality when properly installed.
Do I need to replace hangers and bushings when installing new leaf springs?
While not always mandatory, we strongly recommend replacing hangers, bushings, and U-bolts when installing new leaf springs. Worn hangers can cause premature spring failure and alignment issues. A complete refresh typically adds only 1-2 hours to installation time but can extend the life of your new springs by 40-50%. Most customers find the additional investment worthwhile for preventing future roadside breakdowns.
What tools and equipment do I need for installation?
Installation requires a heavy-duty floor jack (minimum 10-ton capacity), jack stands rated for commercial trucks, a 3/4" drive socket set, torque wrench capable of 450 ft-lbs, and spring compressors for safety. The job typically takes 4-6 hours per side for experienced mechanics. Many customers choose professional installation due to the specialized equipment needed and safety considerations when working with heavy spring tension.
How can I tell if my leaf springs need replacement?
Common signs include visible cracks in the spring leaves, excessive sagging (more than 2 inches from original ride height), separated or shifted leaves, broken center bolts, or a harsh, bouncy ride. Uneven tire wear and difficulty maintaining alignment are also indicators. Regular inspections during oil changes can catch problems early. Most 387 leaf springs last 300,000-500,000 miles under normal loading conditions.
