Frequently Asked Questions About Peterbilt 567/579 Shock Absorbers

Will these shock absorbers fit both my Peterbilt 567 and 579 models, and what years are compatible?

Most shock absorbers in this category are designed to fit Peterbilt 567 models from 2013-present and Peterbilt 579 models from 2012-present. However, compatibility can vary based on your truck's specific configuration, including cab type (day cab vs. sleeper), suspension setup, and whether you have air ride or spring suspension. Always check the product specifications for your exact model year and configuration, or contact our support team with your VIN for verification.

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

OEM shocks are built to original factory specifications and typically last 50,000-75,000 miles under normal conditions. Aftermarket options like Gabriel, Monroe, or Bilstein often feature upgraded materials, improved valving, and can last 75,000-100,000+ miles. Heavy-duty aftermarket shocks are ideal if you frequently haul maximum loads or drive on rough roads. For standard highway driving with typical loads, quality aftermarket shocks offer the best value without sacrificing performance.

Can I install these shock absorbers myself, and what tools will I need?

Installation typically takes 2-3 hours for experienced mechanics and requires basic tools including socket wrenches (typically 18mm-24mm), a floor jack, jack stands, and penetrating oil for stubborn bolts. The upper mounts can be challenging to access on some configurations. While DIY installation is possible, we recommend professional installation if you're not comfortable working with suspension components, as improper installation can affect ride quality and safety.

How do I know when my shock absorbers need replacement?

Common signs include excessive bouncing after hitting bumps (more than 2-3 oscillations), nose-diving during braking, uneven tire wear, visible oil leaks on the shock body, or a noticeably rougher ride. You can also perform a bounce test by pushing down firmly on each corner of the cab - if it bounces more than once, the shocks likely need replacement. Most drivers report needing replacement between 75,000-150,000 miles depending on driving conditions.

Are gas-charged or hydraulic shock absorbers better for my Peterbilt?

Gas-charged (nitrogen) shocks resist fade better under heavy use and provide more consistent damping, making them ideal for heavy haulers or drivers who frequently encounter rough roads. They typically cost 20-30% more than hydraulic shocks. Standard hydraulic shocks work well for highway driving with moderate loads and offer a slightly softer ride. Most Peterbilt 567/579 drivers prefer gas-charged shocks for their durability and consistent performance across varying load conditions.