Peterbilt 330/335/337 Shock Absorbers

Frequently Asked Questions About Peterbilt 330/335/337 Shock Absorbers

Will these shock absorbers fit my specific Peterbilt 330, 335, or 337 model year?

Most aftermarket shock absorbers for Peterbilt 330/335/337 models are designed to fit trucks manufactured from 2005 to present. However, there can be variations based on your truck's suspension configuration (air ride vs. spring suspension) and whether you have a standard or extended cab. Always verify compatibility by checking your current shock's part number or measuring the extended and compressed lengths. The mounting style (eye-to-eye, stem-to-stem, or eye-to-stem) must also match your truck's setup.

How difficult is it to install these shock absorbers myself, and what tools do I need?

Installation typically takes 1-2 hours per axle for someone with basic mechanical skills. You'll need a floor jack, jack stands, basic hand tools (wrenches and sockets ranging from 15mm to 24mm), and penetrating oil for stubborn bolts. The most challenging part is often removing old, corroded mounting bolts. Many customers report that having a second person helps, especially when aligning the new shocks. If you're not comfortable working under your truck, professional installation usually costs $100-200 per axle.

What's the difference between OEM and aftermarket shock absorbers for these models?

OEM shocks typically last 80,000-120,000 miles and maintain factory ride characteristics but cost 40-60% more than quality aftermarket options. Aftermarket brands like Gabriel, Monroe, and Bilstein offer comparable or improved performance at lower prices. Heavy-duty aftermarket shocks often feature larger piston diameters, improved seals, and nitrogen charging for better heat dissipation. For vocational trucks doing construction or delivery work, heavy-duty aftermarket shocks often outperform OEM in both longevity and ride quality.

How do I know when my Peterbilt 330/335/337 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, uneven tire wear, or a noticeably rougher ride. For these medium-duty trucks, shocks typically need replacement every 50,000-75,000 miles depending on application. Vocational trucks in construction or refuse collection may need more frequent replacement due to constant loading changes and rough terrain.

Should I replace all shock absorbers at once or can I do them individually?

For optimal handling and safety, always replace shocks in axle pairs (both fronts or both rears together). Mismatched shock performance can cause uneven weight distribution, premature tire wear, and unpredictable handling, especially when loaded. While replacing all 4-6 shocks at once provides the most consistent ride quality and handling, you can replace front and rear pairs separately if budget is a concern. Just ensure you use the same brand and model on each axle to maintain balanced performance.