Drivetrain & Power Transmission Solutions

What We Service

We work on a wide range of drivetrain and power transmission components, including:

• Axles & Differentials (open, limited-slip, locking systems)

• Transfer Cases & PTO Systems (power distribution and auxiliary drive units)

• Industrial Gearboxes (spur, helical, herringbone, planetary, multi-stage, etc)

• Driveline Components (shafts, bearings, seals, and housings)

• Heavy Equipment Final Drives and Hub Assemblies

Each system is inspected for wear patterns, operating loads, and component condition to determine whether repair, rebuild

Our Approach

We take a structured, inspection-driven approach to every job:

• Full teardown and component inspection

• Measurement of gear wear, backlash, and tolerance deviations

• Identification of root failure points rather than just symptoms

• Rebuild or repair using matched components where required

• Final verification of alignment and load contact patterns

This process helps ensure reliability under real operating conditions—not just bench testing.

Service Area

Services Overview

Axles & Differentials

We provide axle and differential diagnostics, repair, rebuilds, and remanufacturing for commercial trucks, heavy equipment, industrial machinery, agricultural equipment, and off-road vehicles. Services include bearing and seal replacement, gear setup, backlash adjustment, wear inspection, and complete differential rebuild work. Proper inspection and repair help prevent drivetrain failure, reduce downtime, and restore reliable power transfer under load.

Drivetrain Diagnostics & Failure Analysis

Drivetrain failures rarely happen without warning. We frequently identify and repair issues such as:

• Gear whine or howl under acceleration or load

• Excess vibration at highway or operating speeds

• Metal contamination in gear oil or lubricant breakdown

• Bearing fatigue and overheating

• Incorrect gear mesh or alignment issues after prior repairs

• Seal failure leading to fluid loss or contamination

Early diagnosis helps prevent cascading damage and reduces overall repair costs.

Our Customers

We routinely support:

• Commercial trucking and logistics fleets

• Construction and heavy equipment operators

• Agricultural and farming equipment owners

• Industrial facilities and manufacturing operations

• Specialty off-road and vocational vehicles

Our services are designed for equipment where downtime directly impacts productivity.

Based in Jacksonville, Old Glory Fabrication & Repairs provides drivetrain repair, diagnostics, and rebuild services throughout Northeast Florida and the Southeast. We work with commercial trucking fleets, construction companies, agricultural operators, industrial facilities, off-road equipment owners, and independent operators who rely on heavy-duty equipment every day.

We regularly service drivetrain components for highway trucks, heavy equipment, vocational vehicles, industrial machinery, agricultural equipment, and specialty applications across Duval County and surrounding areas. Common work includes axle and differential rebuilds, transfer case and PTO repairs, industrial gearbox service, driveline repairs, and failure diagnostics.

For customers outside the Jacksonville area, we also accept shipped drivetrain assemblies for teardown, inspection, troubleshooting, and precision rebuild work. This allows fleets, repair shops, and equipment owners across the region to access detailed drivetrain diagnostics and component rebuilding without needing local drivetrain specialists.

Our focus is straightforward: accurate diagnosis, proper repair procedures, and dependable drivetrain performance for equipment that works under load every day.

We perform drivetrain diagnostics and root cause failure analysis (RCFA) for commercial trucks, heavy equipment, industrial machinery, and specialty vehicles. Inspections include gear wear analysis, backlash measurement, bearing inspection, vibration diagnosis, lubricant contamination checks, and component failure evaluation. Accurate diagnostics help identify the source of drivetrain problems, prevent repeat failures, and reduce unnecessary repair costs and downtime.

Transfer Cases & PTOs

We service transfer cases and PTO systems used in commercial trucks, vocational equipment, industrial machinery, and heavy-duty applications. Services include diagnostics, repair, rebuilds, resealing, bearing replacement, gear inspection, and complete remanufacturing. Proper transfer case and PTO service helps maintain correct power distribution, reliable auxiliary equipment operation, and long-term drivetrain performance.

Maintenance & Inspection

We provide drivetrain maintenance and inspection services for heavy-duty, commercial, industrial, and off-road equipment. Services include fluid inspection, leak checks, bearing and seal inspection, driveline evaluation, gear wear monitoring, and preventative maintenance. Routine inspection and service help identify problems early, reduce unexpected failures, and extend the operating life of drivetrain components.

Industrial Gearboxes

Common Issues

We provide industrial gearbox diagnostics, repair, rebuilds, and remanufacturing for manufacturing equipment, processing systems, conveyors, pumps, and heavy industrial machinery. Services include gear inspection, bearing replacement, shaft repair, seal replacement, alignment checks, and failure analysis. Proper gearbox service helps reduce wear, prevent unexpected breakdowns, and maintain reliable torque transfer in demanding operating environments.

Custom Solutions

We handle drivetrain and power transmission work for equipment that falls outside standard repair categories. This includes custom applications, vocational trucks, agricultural equipment, industrial machinery, off-road vehicles, and specialty systems with unique operating requirements. Each project is evaluated based on equipment use, load conditions, and component design to determine the most practical repair or rebuild approach.