Truck Repair & Service: Driveline Expertise You Can Trust

For over 50 years, General Truck Parts has been a trusted name in the heavy-duty truck industry, providing dependable driveline remanufacturing and reliable truck service built on a foundation of experience, precision, and pride. From complete drivetrain remanufacturing nationwide to full-service truck maintenance in Chicago, General Truck Parts has earned its reputation as the go-to partner for fleets, municipalities, and owner-operators across North America.

A Legacy of Reliability and Expertise

Since 1974 we have combined technical mastery with old-fashioned customer care. What began as a specialty shop focused on remanufacturing transmissions, differentials, transfer cases, and PTOs has evolved into a full-service operation supporting every aspect of heavy-duty truck repair, maintenance and parts supply. We offer complete driveline repair and service to our Chicago customers, and foster partnership-based relationships with customers across North America.

With 12 locations across the US and a team of highly skilled technicians, GTP delivers factory-quality workmanship with the responsive service customers depend on to keep their trucks on the road.

Comprehensive Truck Repair & Service

Backed by decades of drivetrain expertise, our Truck Repair & Service division provides a complete lineup of repair and preventive maintenance services for heavy-duty and vocational trucks. Whether it’s a transmission rebuild or a routine DOT inspection, every job is performed to the same exacting standards that define the company’s remanufacturing process.

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Core service offerings Include:

Transmission & Driveline Service

Transmission fluid replacement (manual & automatic)
Clutch adjustment or replacement
Torque converter diagnostics
PTO system checks and repair
Driveshaft repair/replacement and U-joint lubrication
Center support bearing replacement and driveline alignment

Differential & Axle Service

Gear oil replacement and ring/pinion inspection
Seal replacements and vibration diagnostics

Brake System Service

Air brake system diagnostics and ABS repair
Pad, drum, rotor, and shoe replacement
Slack adjuster and brake chamber inspections

Suspension & Steering

Leaf spring and air suspension repair
Kingpin, tie rod, and drag link service
Power steering pump, gearbox, and fluid service
Alignment for reduced tire wear and improved handling

Electrical & HVAC Systems

ECM/ECU diagnostics, starter and alternator repair
Trailer lighting and 7-way plug service
AC recharge, heater core repair, and cab climate control

Preventive Maintenance (PM)

DOT inspection preparation
PM A/B/C service programs
Greasing, filter changes, belt/hose checks, and tire rotation
Engine oil, coolant, and DEF system service

Specialized Systems

PTO Service
Installation, rebuilds, hydraulic pump coupling, and custom setups for dump trucks, mixers, and vocational units

Kingpin Service
Bushing replacement, axle eye inspection, and machining for front axle stability

Fuel & Exhaust
DPF cleaning, EGR valve service, fuel injection diagnostics, and exhaust leak repairs

Wet Kit Installation
Custom hydraulic system setup, precision component integration, fluid and pressure testing

Built on Quality — Driven by Integrity

At the heart of General Truck Parts’ success is its remanufacturing excellence. The company continues to set the standard in OE-quality remanufactured drivetrain units for heavy-duty and off-highway vehicles, including transmissions, differentials, transfer cases and Power Take-Off (PTO) units.

Each remanufactured component is rebuilt in-house to precise OEM specifications, tested on industry-leading dynamometers and other equipment, and backed by a comprehensive warranty. Combined with one of the most complete inventories of drivetrain parts and components in the country, GTP ensures customers get the right part, at the right time, with confidence in its quality.

Trusted Across Every Industry

From construction and vocational fleets to regional trucking, agriculture, and municipal operations, General Truck Parts proudly supports the industries that keep America moving. With a focus on minimizing downtime and maximizing performance, GTP’s dedicated service and parts professionals deliver dependable solutions for every truck and every application.

For five decades, General Truck Parts has stood for dependability and trust that’s earned, not advertised. Whether it’s rebuilding a transmission, servicing a differential, or performing a complete PM inspection, every job is handled with attention to detail and pride in craftsmanship.

Learn more or schedule service at generaltruckparts.com/repair or call (800) 621-3914.

Recent Knowledge Base Articles

Understanding the Relationship Between the Clutch and Transmission in Heavy-Duty Truck Drivelines

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