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Kenworth T300-T450 Shock Absorbers
Frequently Asked Questions About Kenworth T300-T450 Shock Absorbers
What are the exact model years and compatibility for T300-T450 shock absorbers?
Kenworth T300-T450 shock absorbers are designed for T300 models (1994-2007), T400 models (1997-2004), and T450 models (2005-2007). However, there are variations based on suspension type and GVWR. Always verify your specific suspension configuration (spring or air ride) and axle weight rating before ordering. Check your VIN plate or contact us with your truck's serial number for exact fitment confirmation.
What's the difference between OEM and aftermarket shock absorbers for these models?
OEM shocks typically use monotube construction with nitrogen charging, while quality aftermarket options often feature twin-tube designs with similar or improved damping characteristics. Aftermarket brands like Gabriel, Monroe, and Bilstein offer heavy-duty variants that can handle 12,000-20,000 lb front axle ratings. The main differences are price (aftermarket typically 40-60% less), warranty coverage (aftermarket often 1-3 years vs OEM limited), and availability. Both options maintain ride quality when properly matched to your application.
How difficult is the installation process and what tools are required?
Front shock replacement typically takes 1-2 hours per side and requires basic hand tools: 3/4" and 7/8" wrenches, socket set, jack stands, and a floor jack. The upper mount uses a stem-style connection requiring a 9/16" wrench to hold the shaft while removing the nut. Common challenges include seized lower bolts due to road salt exposure and limited clearance on air-ride equipped models. Professional installation runs $150-300 for all four shocks if you prefer not to DIY.
How do I know when my T300-T450 shocks need replacement?
Replace shocks when you notice: excessive bouncing after hitting bumps (more than 2-3 oscillations), visible oil leakage on the shock body, uneven tire wear patterns, nose-diving during braking, or physical damage like bent shafts or broken mounts. Most operators report replacement intervals between 80,000-150,000 miles depending on load conditions and road quality. Shocks should always be replaced in pairs per axle to maintain balanced handling.
What length and mount style do I need for my specific T300-T450 configuration?
Standard configurations use 19.5" extended/12.5" compressed front shocks with loop-style lower mounts and stem upper mounts. Rear shocks vary more significantly: standard height uses 26.5" extended/16" compressed, while raised suspension packages require 29" extended units. T450 models with heavy-duty packages may use larger diameter bodies (2.25" vs standard 2"). Always measure your current shocks when compressed and extended, or provide your complete VIN for accurate specifications.