Peterbilt 352 Shock Absorbers

Frequently Asked Questions About Peterbilt 352 Shock Absorbers

Will these shock absorbers fit my specific year Peterbilt 352?

Most aftermarket shock absorbers for the Peterbilt 352 are designed to fit models from 1969 through 1981. However, there can be variations based on suspension configurations and whether your truck has been modified. We recommend checking your current shock's extended and compressed lengths, along with the mounting style (eye-to-eye, stem-to-stem, or combination) before ordering. If you're unsure, contact us with your OEM and we'll help verify compatibility.

What's the difference between standard and heavy-duty shock absorbers for my 352?

Standard shocks work well for highway driving and lighter loads, typically rated for standard GVWR applications. Heavy-duty shocks feature larger pistons, thicker shafts (usually 1" vs 7/8"), and stronger internal valving designed for vocational trucks, off-road use, or consistently heavy loads. If you regularly haul near maximum capacity or drive on rough terrain, heavy-duty shocks will provide better control and last longer. They typically cost 20-30% more but offer superior durability.

Can I install these shock absorbers myself, or do I need special tools?

Installation is straightforward for someone with basic mechanical skills and can typically be completed in 2-3 hours. You'll need standard hand tools, jack stands, and a floor jack. The most challenging part is usually breaking loose the old mounting bolts, which may require penetrating oil and an impact wrench. Some lower mounting points can be tight to access, so having a variety of socket extensions helps. Always replace shocks in pairs per axle for balanced performance.

How do I know when my Peterbilt 352's shocks need replacement?

Common signs include excessive bouncing after hitting bumps (more than 2-3 oscillations), nose diving during braking, visible oil leaks on the shock body, or uneven tire wear. Also check for physical damage like dents, bent shafts, or worn bushings. Most shocks last 50,000-75,000 miles in normal service, but this varies greatly based on load weight and road conditions. If your truck feels unstable or "floaty" at highway speeds, worn shocks are often the culprit.

Are gas-charged shocks worth the extra cost for my Peterbilt 352?

Gas-charged (typically nitrogen) shocks reduce fade during extended use and minimize foaming of the shock oil, providing more consistent damping. They're particularly beneficial if you drive long distances, encounter frequent elevation changes, or operate in extreme temperatures. While they cost roughly 15-25% more than standard hydraulic shocks, they typically last longer and maintain better ride quality throughout their service life. For occasional use or lighter duty applications, standard hydraulic shocks are usually sufficient.