Frequently Asked Questions About International S1700-S1900 Shock Absorbers

Will these shock absorbers fit my specific International S-Series truck model and year?

These shock absorbers are designed for International S1700, S1800, and S1900 Series trucks manufactured between 1979 and 2004. However, compatibility can vary based on your truck's specific configuration, including cab type, suspension setup, and whether it has air or spring suspension. We recommend checking your current shock absorber part numbers or contacting our support team with your VIN to ensure proper fitment before ordering.

What's the difference between OEM and aftermarket shock absorbers for my S-Series truck?

OEM shock absorbers typically use original International/Navistar specifications and may cost more, while quality aftermarket options often provide comparable or improved performance at a lower price point. Many aftermarket shocks feature upgraded valving, heavy-duty construction, and nitrogen charging for better heat dissipation. Popular aftermarket brands like Gabriel, Monroe, and Bilstein often offer enhanced durability for trucks used in demanding commercial applications.

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

Installation typically takes 2-4 hours for all four shocks, depending on your experience level. You'll need basic hand tools including socket wrenches (typically 18mm-24mm), penetrating oil for rusty bolts, and jack stands to safely support the truck. The upper mounts can be challenging to access on some cab configurations. Many customers report that having an impact wrench significantly speeds up the job, especially when dealing with corroded hardware common on older S-Series trucks.

How do I know when my S-Series shock absorbers need replacement?

Common signs include excessive bouncing after hitting bumps, nose-diving during braking, visible oil leaks on the shock body, uneven tire wear, and a rougher ride quality than normal. For S-Series trucks used in commercial service, most operators replace shocks every 50,000-75,000 miles as preventive maintenance. If your truck leans excessively during turns or the front end feels loose over bumps, worn shocks are often the culprit.

Should I replace all four shock absorbers at once, or can I do them in pairs?

We strongly recommend replacing shock absorbers in axle pairs (both fronts or both rears) at minimum to maintain balanced handling and prevent uneven wear. However, replacing all four at once is ideal, especially for commercial vehicles. This ensures consistent ride quality, prevents premature wear on new shocks paired with worn ones, and saves on labor costs if you're paying for installation. Most fleet operators replace all four as standard practice.