Frequently Asked Questions About Kenworth T660 Shock Absorbers

What years and models of Kenworth T660 are these shock absorbers compatible with?

Our shock absorbers are designed to fit Kenworth T660 models from 2008 to 2016. However, compatibility can vary based on your truck's specific configuration, including cab type (day cab vs. sleeper), suspension setup (air ride vs. spring), and axle configuration. We recommend checking your existing shock part numbers or contacting our support team with your VIN to ensure proper fitment.

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

Installation typically takes 1-2 hours per axle for experienced mechanics. You'll need basic hand tools including socket wrenches (typically 18mm-24mm), a torque wrench, jack stands, and potentially a spring compressor for some applications. The upper and lower mounting bolts can be challenging to access, especially on the front axle. Many customers report that having a second person helps significantly. Professional installation is recommended if you're not comfortable working with suspension components.

What's the difference between OEM and aftermarket shock absorbers for my T660?

OEM shocks are manufactured to Kenworth's original specifications and typically last 100,000-150,000 miles under normal conditions. Aftermarket options like Gabriel, Monroe, or Bilstein often provide similar or enhanced performance at a lower price point. Heavy-duty aftermarket shocks may offer better damping for loaded conditions or rough roads. The main differences are in warranty coverage (OEM usually 1 year, aftermarket varies), price (aftermarket typically 30-50% less), and availability of upgraded options like adjustable damping.

How do I know when my T660 shock absorbers need replacement?

Common signs include excessive bouncing after hitting bumps (more than 2-3 oscillations), oil leaking from the shock body, uneven tire wear, nose-diving during braking, or a rough, unstable ride. You can also perform a bounce test: push down hard on each corner of the truck and release. If it bounces more than once, the shocks likely need replacement. Most T660 shocks require replacement between 100,000-200,000 miles, depending on load conditions and road quality.

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

While you can replace individual shocks, we strongly recommend replacing them in axle pairs (both fronts or both rears) to maintain balanced handling and prevent premature wear on the new shock. Mismatched shocks can cause uneven weight distribution, irregular tire wear, and compromised handling. If your truck has over 150,000 miles, consider replacing all shocks at once for optimal performance and to save on labor costs if you're having them professionally installed.