In the fast-paced world of semi truck transportation, keeping your Freightliner in top working condition is pivotal to your operation’s success. For semi truck transportation companies and repair shops, ensuring that all parts—from OEM to aftermarket—are functioning optimally can prevent costly downtime and ensure efficient hauls. Here’s a guide to essential semi truck parts you should consider to keep your Freightliner running smoothly in 2026.
Transmission and Differential
Maintaining the transmission and differential systems in SEMI TRUCKS is crucial. One significant component to consider is the Manual Transmission Main Shaft Gear. This part ensures that power is efficiently transferred from the engine to the wheels, providing the necessary torque for heavy loads. Regular inspection and timely replacement with high-quality OEM or AFTERMARKET PARTS can prevent transmission issues that may lead to expensive repairs.
Seals and Gaskets
Oil leaks can spell disaster for any FREIGHTLINER TRUCKS’ performance. Therefore, using dependable seals like the Oil Seal is essential. These components prevent oil leakage, ensuring that your engine and transmission systems remain lubricated and perform at their best, thus prolonging the life of your truck.
Suspension and Braking Systems
To maintain a smooth ride and ensure safety, your truck’s suspension and braking systems must be in optimal condition. The Suspension Equalizer Beam Center Bushing plays a vital role in the alignment and support of your truck’s suspension system. Similarly, the Air Brake Manual Slack Adjuster is a crucial component that keeps your brakes functioning properly, providing superior stopping power.
Hydraulics and Power Take Off

For those hauling heavy TRAILERS, the hydraulic systems’ integrity is non-negotiable. Opt for reliable components like the Hydraulic Pump to ensure your truck's power take-off (PTO) system is up to any challenge. This is particularly important for KENWORTH TRUCKS known for heavy-duty applications.
Repair and Maintenance
Routine maintenance involves regular inspection and replacement of worn-out parts to keep your fleet running efficiently. One common aftermarket addition that enhances durability and performance is the Snap Ring. Incorporating such parts can improve your truck’s operational lifespan.
By investing in high-quality parts and regular maintenance, fleet managers can prevent unexpected breakdowns and extend the operational life of their trucks. Whether you prefer OEM or AFTERMARKET PARTS, ensuring these essential components are in top form is vital for uninterrupted operations.
For more information on keeping your fleet in top condition, visit Fleets World.
Remember, a well-maintained semi truck is key to a successful transportation operation. Stay ahead by keeping up with the necessary components and regular inspections to ensure a smooth journey for your FREIGHTLINER and KENWORTH TRUCKS.



