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QUALITY. EXPERIENCE. TRUST.
We are a Partnership-Based Company
Explore Our Products
Spicer 1750 Series 4-Speed Auxiliary Transmissions
Designed for heavy-duty and off-highway applications, these 4-speed units expand your gear range for more pulling power, smoother highway operation, and improved fuel efficiency. We have the lowest prices in the industry – get your quote today or call 800-621-3914.
Automated Manual Transmissions
General Truck Parts specializes in providing new and remanufactured Automated Manual Transmissions (AMTs) for off-highway and heavy-duty trucks.
New & Remanufactured TRANSFER CASES
We are proud to offer a complete line of popular and hard-to-find transfer cases, designed for superior performance, durability and efficiency in the most demanding heavy-duty and off-highway applications. We stock Meritor, Dana/Spicer, Fabco, Marmon-Herrington, OMSI, Cotta and more.
Remanufactured Units
General Truck Parts and Equipment offers
top-quality remanufactured transmissions,
axles, differentials, and more.
Wholesale Parts
General Truck Parts and Equipment offers
top-quality remanufactured transmissions,
axles, differentials, and more.
Off-Highway
General Truck Parts and Equipment offers
top-quality remanufactured transmissions,
axles, differentials, and more.
Industries Served
Transportation
Trucking companies that transport goods locally in Chicago, nationally across the US, and internationally rely on our expertise.
Construction
Construction companies that require specialized parts for heavy-duty trucks like dump trucks and concrete mixers turn to General Truck Parts.
Waste & Recycling
Garbage trucks, recycling trucks, and other waste management vehicles need durable parts for efficient operation we specialize in.
We Work With the Brands You Trust
Customer Testimonials
When we need specific Spicer, Marmon and Fabco parts no one else has around, we turn to GTP every time.
They always have that hard to find or no longer available part or unit. Highly recommend.
General has been my go-to for 15 years. The inventory is huge, the staff is a trove of info and orders arrive on time.
Our Business at a Glance
50+
YEARS IN BUSINESS
575,000
SQUARE FEET OF WAREHOUSE SPACE
12,000
NEW & REMANUFACTURED UNITS READY TO SHIP
250+
EMPLOYEES IN 12 LOCATIONS
Recent Knowledge Base Articles
Transfer Cases: The Unsung Heroes of the Heavy-Duty Truck Driveline
September 11, 2025
When people think about truck drivetrain components, transmissions and differentials often take center stage. But for many heavy-duty truck drivelines,…
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Heavy-Duty and Off-Highway Truck Transaxle Components: What You Need to Know
August 14, 2025
For heavy-duty trucks and off-highway vehicles, the drivetrain is the backbone of performance. At the heart of that drivetrain is…
Read More
What Is a PTO (Power Take-Off) and Why It Matters in Off-Highway Applications
July 29, 2025
In the world of off-highway equipment, where power, durability, and efficiency are non-negotiable, a Power Take-Off (PTO) system is a…
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A Brief History of the Automated Manual Transmission (AMT) in Heavy Trucks
July 8, 2025
Automated Manual Transmissions (AMTs) are hybrid gearboxes that combine the internal mechanism of a traditional manual transmission with electronic controls to automate clutch engagement and gear shifting….
Read More
Remanufactured vs Rebuilt vs Used: What’s the Difference?
May 12, 2025
Choosing the Right Drivetrain Components for Your Heavy-Duty Truck When it comes to replacing critical drivetrain components—like transmissions, differentials, transfer…
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What is a Dynomometer?
April 30, 2025
How Precision Testing Powers Quality in Every Truck Part We Sell When it comes to truck parts and heavy-duty equipment,…
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How to Choose the Right Remanufactured Truck Differential: Key Considerations for a Reliable Replacement
April 23, 2025
When a differential fails, truck owners and fleet managers are faced with a critical decision: repair, replace, or upgrade. For…
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The Legacy of Dana and Spicer: A Deep Dive Into Two Icons of the Trucking Industry
April 21, 2025
When it comes to the evolution of truck drivetrains, axles, and power transfer systems, few names are as influential as…
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The Remanufacturing Process: How We Bring Transmissions and Differentials Back to Life
April 15, 2025
At General Truck Parts, we understand the critical role that transmissions and differentials play in the performance and safety of…
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Differentials 101: What They Do and Why They Matter in Off-Highway Applications
April 9, 2025
When it comes to off-highway trucks, machinery, and heavy equipment, many intricate systems work together to ensure reliable performance in…
Read More
Contact Us Today
Our Experts are available to answer your questions and help you with your needs.
We take pride in getting you your answers, parts, and assemblies fast.
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