Axles & Differentials

Service Scope

We provide complete axle and differential solutions in Jacksonville, covering everything from preventative maintenance to forensic remanufacturing of complex gearsets.

• Differential Rebuilds: Complete restoration of open, limited-slip, and locking differentials.

• Gearless Axle Service: Spindle, hub, and bearing care for utility and commercial trailers.

• Precision Gear Setup: Expert ring and pinion replacement with verified gear patterning.

• Axle Shaft Repair: Restoration and replacement of shafts and housing components.

• Bearing & Seal Service: Critical moisture and debris protection to prevent internal failure.

• Contamination Diagnosis: Forensic analysis of gear oil to identify early wear patterns.

Common Symptoms

Recognizing the early acoustic and tactile signs of drivetrain wear can prevent catastrophic mechanical failure and high-cost equipment downtime.

• Whining or Howling: Sounds that change with acceleration, often indicating pinion or carrier bearing fatigue.

• Clunking or Popping: Usually felt during gear engagement or turns, signaling spider gear or locker failure.

• Vibration Under Load: Often linked to carrier bearing wear or unbalanced drivetrain components.

• Fluid Contamination: Metallic "glitter" or burnt odor in gear oil indicates active internal damage.

• Uneven Tire Wear: Can be caused by failing locking mechanisms or bent axle housings.

Our Process

Our technical protocol ensures every rebuild meets or exceeds OEM specifications through documented measurements and forensic cleaning.

• Forensic Teardown: Complete disassembly and chemical cleaning to reveal hidden stress fractures.

• Wear Analysis: Documentation of gear patterns and tolerances against factory standards.

• Precision Calibration: Setting backlash, pinion depth, and preload to within .001 inch.

• Quality Verification: Final gear mesh check using marking compound for 100% load distribution.

• Operational Testing: Validation of smooth torque transfer before the unit is returned to service.

Applications & Industries

We support the specialized drivetrain needs of Jacksonville’s logistics, construction, and agricultural sectors with heavy-duty repair solutions.

• Commercial Trucking: Specialized service for Class 8 Eaton, Spicer, and Rockwell units.

• Construction & Earthmoving: Final drive and planetary hub restoration for Cat and John Deere machinery.

• Agriculture & Farming: Heavy-duty tractor axle and gearbox repair to minimize harvest downtime.

• Specialty & Performance: Custom re-gearing and locker installations for 4x4s and tow recovery vehicles.

Why Us?

We position ourselves as the technical authority in Jacksonville, focusing on high-accuracy gear alignment and heavy-duty durability.

• Expert Diagnostics: We find the root cause of the noise, not just the broken part.

• Industrial Capability: Specialized tooling for Class 8, Construction, and Agricultural units.

• Documented Build Specs: You receive a record of the precision tolerances used in your rebuild.

• OEM Quality Parts: We utilize master overhaul kits and premium components for long-term reliability.

• Minimized Downtime: Fast, accurate turnarounds for commercial fleet situations.

Service Area

Based in Jacksonville, we provide local and regional drivetrain support throughout the First Coast and Southeast Georgia.

• Jacksonville & Duval County: Direct support for metro-area industrial and shipping hubs.

• First Coast Region: Service for Clay, St. Johns, and Nassau Counties.

• Southeast Georgia: Regional coverage extending into the Brunswick area.

• Nationwide Bench Service: We accept shipped-in assemblies from across the country for precision rebuilds.

Pricing & Estimates

Transparent estimates are provided following a physical teardown to ensure you only pay for the specific repairs your equipment requires.

• Gearless Axle Service: Starting at $500 for spindles, hubs, and bearings.

• Differential Rebuild Labor: Typically starting at $900 for precision setup.

• Diagnostic Teardown: Flat-rate inspection fee credited toward your final repair.

• Commercial Fleet Programs: Specialized volume pricing for vocational and freight fleets.

Note: Diagnostic fees are credited toward the total cost of the repair if you choose to proceed with the rebuild. Performance and heavy-duty upgrades for Class 8 or off-road applications are quoted on a per-project basis.

Frequently Asked Questions

Expert answers to common questions regarding Jacksonville differential repair and axle maintenance.

• Where can I find commercial differential repair in Jacksonville?

  • Old Glory Fab specializes in heavy-duty and commercial drivetrain solutions for the Jacksonville metro area.

• Why is my differential making a whining noise?

  • This usually indicates gear misalignment or bearing wear, requiring precision shim adjustments.

• What is the cost for a differential rebuild?

  • Labor typically starts at 900 for most units, plus the cost of master overhaul kits.

• Do you service Eaton and Spicer differentials?

  • Yes, we specialize in high-torque drivetrain systems found in Class 8 trucks and heavy equipment.

• Can you repair planetary axles?

  • We provide expert repair for planetary hubs found on Caterpillar, John Deere, and other earthmoving machinery.

• How long does a standard rebuild take?

  • Most precision rebuilds are completed within 3 to 5 business days, depending on parts availability.

• Can I ship my differential to your shop?

  • Yes, many clients ship their third members or axle assemblies directly to our Jacksonville facility.

• What is a forensic teardown?

  • It is a complete disassembly and chemical cleaning used to identify the root cause of component failure.

• Do you service trailer axles?

  • Yes, we provide full spindle, hub, and bearing service for gearless trailer axles, including utility, boat, and commercial freight trailers.