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Truck Components

Keeping a semi truck in top condition starts with understanding its many moving parts. Semi truck components include engines, braking systems, suspension setups, fuel systems, electrical networks, and transmissions, each working together to keep your rig running strong. These critical truck parts handle everything from pulling heavy loads to protecting cargo during long hauls.

 

Knowing how each semi truck part functions is vital for preventive maintenance and roadside troubleshooting. Whether you drive a semi daily or manage a fleet, investing time in understanding your vehicle’s core components helps extend service life and boosts performance across every mile.

 

By focusing on maintenance and using quality parts, drivers can lower repair costs, improve fuel efficiency, and keep their trailer and truck road-ready.

24 of 45 Items
  • Air Brake Automatic Slack Adjuster

    Automann

    Air Brake Automatic Slack Adjuster

    Air Brake Slack Adjuster 1.5"-28 x 5.5"   Automatic Spline Count: 28 Arm Length: 5.5" Spline Diameter: 1.5"   Replaces Part Numbers: 8235-R803048 E-11417A R802446 R803048 TDAR803048  

    $58.02
  • 1710  Series U-Joint

    Automann

    1710 Series U-Joint

    1710 Series U-Joint Replaces Part Numbers: 5-280X 2104-5280X 2301520 2322137 2366104 25-280X 3AL-01150 CP177X 5-177X EM69100 M280X  

    $36.30
  • 1810  Series U-Joint

    Automann

    1810 Series U-Joint

    1810 Series U-Joint Replaces Part Numbers: 02-7074363 5-281X 2104-5281X 2104-581X 2104.281 25-281X E-281X    

    $41.44
  • 1000 Series PTO U-Joint

    Automann

    1000 Series PTO U-Joint

    1000 Series PTO U-Joint Replaces Part Numbers: SPL170-4X 2500678C 2500678C91 3947697 6976 DS170-3X DS170-4X S-E358 SPL170X

    $49.95
  • Steering Hub Cap

    Automann

    Steering Hub Cap

    HUB CAP - 6-HOLE ALUMINUMBolt Circle Diameter:4.5 InchBolt Hole Diameter:.3125 InchBolt Hole Quantity:6Inside Diameter:3.5 InchOutside Diameter:5.25 Inch Replaces Part...

    $17.46
  • Wheel Hub Cover

    Automann

    Wheel Hub Cover

    Hub Cap with Gasket HUB CAP - 6-HOLE W/FITTINGSBolt Circle Diameter:5.5 InchBolt Hole Diameter:.3125 InchBolt Hole Quantity:6 Height:1.8125 InchInside Diameter:4.4375 InchOutside Diameter:6.1875 Inch Replaces Part Numbers: 3404249 343...

    $19.15
  • AD-IS Air Dryer

    Automann

    AD-IS Air Dryer

    Complete ADIS Type Air Dryer Assembly 12V-90W Primary Port 1/4in NPT, Opening Pressure 103PSI Secondary Port 1/4in NPT, Opening Pressure 109PSI Accessory Ports and Suspension Ports Opening Pressure 109PSI 3 Accessory Ports, KW and PB Apps

    $223.94
  • Air Brake Relay Valve Air Brake Relay Valve

    Automann

    Air Brake Relay Valve

      RELAY VALVE 4.0 PSI 1S/4D R-12Cracking Pressure:4 Pounds per Square In Delivery Port Diameter:.5 Inch Delivery Port Quantity:4   Service Port Diameter:.25 Inch Supply Port Diameter:.5 Inch Type R12VThread Type:NPT   Replaces: OE...

    $34.49
  • Air Brake Dryer Cartridge

    Automann

    Air Brake Dryer Cartridge

    Air Dryer Cartridge   Replaces Part Numbers:  5008414PG 4329012452 109994PG 1527757 K020366 AL24 S-27091

    $34.98
  • Wheel Bearing Set (SET413)

    Automann

    Wheel Bearing Set (SET413)

    Wheel Bearing Set Includes Cup and Cone Cone Part Number: HM212049 Cup Part Number: HM212011   Replaces Part Numbers: SET413   Cone Bore Diameter: 2.6250 Cup Outside Diameter: 4.8125 Total Bearing Width: 1.500  

    $21.99
  • Dump  Valve

    Haldex

    Dump Valve

    Height Control Valve Dump Valve Normally Open dump valve allows air to be exhausted from the air springs    when pressure is applied to the pilot port. ALL Ports 1/8" NPT Fittings Provided 1/4" & 3/8" Notes Typically pilot operated...

    $59.48
24 of 45 Items

Truck Engines: Power and Performance

Our inventory features engines tailored for diverse hauling demands, from light local jobs to major freight hauls. Drivers looking for maximum power and reliability will appreciate our lineup, which covers everything from high-torque options to engines built for long-distance durability.

When it comes to aftermarket semi truck parts, we offer premium engines designed for better performance, smoother driving, and lower operating costs. Compared to basic models, our engines deliver greater efficiency, helping drivers stretch every gallon of fuel.

You can also support your engine's health with our maintenance kits. Built to improve airflow, optimize combustion, and reduce wear, these kits make a real difference in both daily driving and long-term ownership.

Braking Systems: Safety and Reliability

Our selection of brake parts includes high-performance brake pads, air brake valves, slack adjusters, and complete drum and disc brake kits. We help you address common problems like uneven wear or reduced braking power with our top-rated replacement products. Our braking solutions not only improve stopping distances but also support regulatory compliance for commercial truck parts standards.

No matter if you drive a Freightliner Cascadia or any other popular semi model, we have dedicated braking system solutions ready to ship. We encourage you to check out our customer reviews which frequently highlight how we help provide safer stops, longer part life, and peace of mind on the road.

Suspension Systems: Comfort and Stability

Handling heavy duty truck parts is about more than brute strength -- comfort and stability are just as important. Our catalog features suspension components like air springs, shocks, and control arms, built to absorb bumps and prevent cargo shifts.

Upgrading your suspension can also boost your fuel efficiency by creating less resistance on the road. For drivers tired of rough rides, our upgrade kits offer an easy, effective solution that improves both handling and overall driving experience.

With a smoother ride, drivers stay comfortable longer, and your semi truck endures less wear and tear on essential components. All of this translates to better ROI.

Other Truck Components

At Fitzgerald Truck Parts, we offer a full lineup of semi truck components designed to support every aspect of your rig's performance. Our selection includes:

  • Cooling and Air Systems: Maintain optimal engine performance with our radiators, intake manifolds, fans, and other essential parts.
  • Heating and AC: Stay comfortable year-round with our blower motors, resistors, switches, receiver driers, AC lines, and evaporator cores.
  • Body Components: Find bumpers, headlights, and body panel upgrades that restore or customize your semi truck's look.
  • Transmission and Components: From transmission oil coolers to shifter poles and reman transmissions, we provide quality parts to keep your truck shifting smoothly.
  • Wheels and Tires: Keep rolling strong with durable wheels, wheel covers, and mudflaps built for heavy duty demands.
  • Electrical System Parts: Power up with alternators, starters, wiring harnesses, sensors, and other essential components.
  • Exhaust Systems: Shop exhaust pipes, heat shields, mufflers, and full exhaust kits for maximum efficiency and durability.
  • Interior and Exterior Accessories: Customize your cab with sun visors, bug deflectors, mirrors, air brake knobs, wood and leather steering wheel replacements, and more.

Our trailer parts selection help keep your rig in peak condition. We cover everything needed to outfit your truck or trailer for maximum performance, safety, and reliability. With us, keeping your rig in top shape has never been easier -- or more affordable.

Get the Semi Truck Components You Need Today

Semi trucks are intricate machines where every part counts. From the braking system to the fuel tank, every component plays a role in safety, performance, and cost efficiency. Routine maintenance and smart part replacements prevent unexpected breakdowns and help drivers avoid costly delays.

The future of trucking promises exciting advancements like smart braking technologies, lighter materials, and predictive maintenance tools. Staying ahead of these trends means working with a supplier that understands the evolving needs of the industry.

When you're ready to upgrade or replace components, we're here with expert advice and an extensive selection of high-quality aftermarket parts designed to keep your truck running strong.

Why Buy from Fitzgerald Truck Parts

Choosing us means more than just buying truck parts -- it means partnering with a team committed to quality, service, and your success. Here's why drivers and fleets trust us:

  • Brands You Trust: We stock parts from top brands and manufacturers known for quality and reliability.
  • Competitive Pricing: Save more with our everyday deals and seasonal parts specials.
  • Expert Support: Our knowledgeable team is here to help you match the right part to your truck or trailer.
  • Fast Shipping: Get the parts you need without the long wait.
  • Extensive Inventory: Whether you need a new fuel tank, upgraded brake pads, or durable trailer parts, we've got you covered.

We make it easy to find the best gear for your heavy duty truck. Shop online, browse by category, or contact us with any questions.