96 of 204 Items
96 of 204 Items
When power, torque, and reliability matter, the engine and drivetrain sit at the heart of every working rig. These systems do the real work, converting fuel into motion and transferring power from the engine to the wheels without hesitation. At Fitzgerald Truck Parts, we supply a full lineup of semi truck engine components and drivetrain solutions built for hard miles, heavy loads, and long-haul performance.
We offer a wide range of critical parts, including semi truck engine parts, semi truck drivetrain parts, transmissions, mounts, seals, bearings, turbochargers, gaskets, and supporting hardware. Our stock includes OEM and high-quality aftermarket options from trusted manufacturers such as Cummins, Caterpillar, Detroit Diesel, Eaton, Jacobs, Fleetguard, Alliance, and Paccar. Each part is selected for durability, precise fitment, and real-world performance, making them a solid choice for owner-operators and fleet managers who demand dependable results from their equipment.
Routine maintenance and timely replacement of worn parts help protect uptime and control operating costs. By replacing aging truck engine components and truck drivetrain components, you support your rig's optimal fuel efficiency while also reducing stress on connected systems and helping avoid breakdowns that can pull trucks off the road at the worst time.
We supply on the top heavy-duty truck engine parts and heavy-duty drivetrain parts, and each one engineered to meet or exceed OEM specifications. These components are built to handle high temperatures, extreme pressure, and constant vibration, all while delivering consistent power and smooth operation across long distances.
Our inventory supports major engine platforms with a strong selection of Cummins engine parts and Detroit Diesel engine parts, along with components designed for popular transmission setups. For repairs requiring deeper service, we carry truck transmission parts and complete engine rebuild kits that give shops and drivers the ability to restore performance without unnecessary guesswork. For full replacements, our selection of Reman Engines delivers tested performance ready for immediate installation.
We also stock essential diesel engine components that support lubrication, airflow, and electronic control systems. Popular subcategories include:
We're proud to deliver parts that can keep heavy-duty trucks pulling strong mile after mile. Plus, with fast shipping, easy online ordering, and knowledgeable support, we make it easier to source the right parts and keep trucks earning.
What parts are included in the engine and drivetrain category?
This category includes truck engines, transmissions, rebuild kits, bearings, seals, turbochargers, gaskets, and other essential powertrain components used to maintain and restore truck performance.
Which brands do you carry for engine and drivetrain parts?
We stock parts from leading manufacturers such as Cummins, Caterpillar, Detroit Diesel, Eaton, Paccar, Jacobs, and Fleetguard.
Are the parts OEM or aftermarket?
We carry both OEM and high-quality aftermarket parts to support different repair needs and budget ranges.
How can I find the right part for my truck?
Search by part number, brand, or truck make and model. Our support team is available to help verify fitment so you order the correct component the first time.