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2018 Peterbilt 320 Shock Absorber

2 items

Replace a worn shock absorber to reduce bouncing, body roll, and uneven tire wear. Shop front and rear suspension shocks built to restore ride control and comfort.

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Rear Driver or Passenger Shock Absorber, 1-Pc A-Premium APSA1418Rear Driver or Passenger Shock Absorber, 1-Pc A-Premium APSA1418
A-Premium®Part # APSA1418
Rear Driver or Passenger Shock Absorber, 1-Pc A-Premium APSA1418
4.740 Reviews
CA$77.99
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3-year warranty
90 days free return
Fits 2012 - 2018 Mack GU5, 2004 - 2014 International Harvester 5600i, 2012 - 2017 Caterpillar CT660, 2021 - 2022 Western Star 49X, 2013 - 2022 Western Star 4800SF, 2019 - 2024 International Harvester HV507, 2008 - 2022 Autocar LLC. Xpeditor, 2022 - 2024 Kenworth T480, 2017 - 2022 International Harvester HX515, 2001 - 2024 Kenworth T800, 2002 - 2008 Peterbilt 357, 2008 - 2015 Peterbilt 388, 2019 - 2024 International Harvester HX620, 2018 - 2024 International Harvester HX520, 2002 - 2020 International Harvester 7500, 2002 - 2020 International Harvester 7300, 2002 - 2024 Freightliner M2 106, 2008 - 2019 Mack GU7, 2008 - 2024 Peterbilt 389, 2012 - 2019 Mack GU4
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 Peterbilt 320
Installation PositionRear Driver or Passenger
Quantity1
Item LocatedCanada
ColorBlack
item #100469A9
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Front Driver or Passenger Shock Absorber, 1-Pc A-Premium APSA1441
A-Premium®Part # APSA1441
Front Driver or Passenger Shock Absorber, 1-Pc A-Premium APSA1441
4.740 Reviews
CA$71.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1999 - 2001 Sterling Truck, 2011 - 2020 Ford F-53, 2017 - 2017 Peterbilt 330, 1992 - 1997 Ford LLA9000, 2013 - 2022 Peterbilt 579, 1987 - 2008 Peterbilt 357, 1999 - 2000 Sterling Truck, 1995 - 2005 Peterbilt 330, 1996 - 1998 Ford AT9513, 1999 - 1999 Sterling Truck, 1986 - 2007 Peterbilt 379, 2006 - 2015 Peterbilt 386, 1988 - 1992 Peterbilt 376, 2010 - 2019 Peterbilt 365, 2008 - 2015 Peterbilt 388, 1987 - 2001 Peterbilt 377, 1993 - 1995 Spartan Motors, 1991 - 1997 Ford LTA9000, 2010 - 2021 Peterbilt 348, 2011 - 2016 Peterbilt 382
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 Peterbilt 320
Installation PositionFront Driver or Passenger
Quantity1
Item LocatedCanada
ColorBlack
item #10046DRL
Show less

Shock Absorbers for Stable Handling and a Smoother Ride

Shock absorbers are a core structural component in a vehicle’s suspension system. Working with the coil spring and other springs, they control movement by converting suspension energy into heat through fluid (oil/gas) resistance inside a pressure tube. The result is better stability, more predictable steering response, and consistent tire contact with the ground—especially over bumps, uneven road conditions, and during braking.

When your vehicle’s suspension system is operating correctly, shocks reduce excessive bounce, limit body roll, and improve overall handling and safety. Whether you drive a daily commuter car on the highway or a truck that sees off road driving, correctly matched shocks help keep the ride controlled, comfortable, and confident.

Signs You Should Replace Shocks and What Causes the Uncomfortable Ride

As shocks wear, their internal piston and seals lose damping efficiency. That’s when you feel an uncomfortable ride—more vibration, longer settling after bumps, and less stability in the front end or rear. Common symptoms include increased bouncing, nose-dive under brake, reduced control in corners, and a “floaty” response at highway speeds.

If you’re planning to replace shocks, consider how your use case accelerates wear: frequent towing, heavy loads, poor road surfaces, and repeated off-road impact all increase heat and stress inside the shock’s mechanism. Worn shocks can also contribute to uneven tire behavior and reduced grip because the wheels can’t maintain consistent contact with the road. Replacing shocks at the right time is a cost-effective way to restore control without chasing secondary issues in the suspension system.

Choosing the Best Shocks for Your Driving Needs

The best shocks depend on how you use the vehicle—load, terrain, and ride preference. Conventional shock absorbers are a solid match for stock driving and everyday road conditions. If you need stronger damping and heat management, twin tube shocks are commonly used for balanced comfort and durability across mixed driving. For trucks and builds that see towing, heavy loads, or off-road use, adjustable shocks can help fine-tune rebound and resistance so the vehicle stays stable under changing weight and road inputs.

Fitment is non-negotiable: match position (front/rear), vehicle type (car or trucks), and suspension design (shock vs strut application). The right set improves braking stability, steering response, and ride quality—helping your suspension system deliver controlled movement and reliable performance over time.