If your diesel truck is struggling to shift, slipping gears, or making strange noises, don’t wait — you may need professional transmission repair or rebuild services. At On Time Truck Repair, we specialize in diagnosing and fixing transmission issues for heavy-duty and commercial diesel trucks. Whether it’s an automatic, manual, or automated manual transmission (AMT), our certified technicians deliver the repairs you need to restore smooth operation and protect your drivetrain.
We work on all major diesel brands — Freightliner, Peterbilt, Mack, Volvo, Kenworth, and more — offering both in-shop and mobile truck repair options. From fluid leaks and clutch replacements to full rebuilds, we provide honest, high-quality service to get you back on the road quickly.
Why Choose On Time Truck Repair for Transmission Services
Our mechanics bring over 60 years of combined experience working on diesel truck transmissions. We don’t just swap parts — we pinpoint the root cause of the issue and fix it the right way. Our shop is equipped with the tools to handle complex diagnostics, internal rebuilds, and complete unit replacements. Whether it’s a single diesel truck or your entire fleet, we’ll keep your transmissions shifting smoothly and your business running strong.
Frequently Asked Questions
1. What are common signs of a transmission issue?
Slipping gears, hard or delayed shifting, transmission fluid leaks, burning smells, or grinding noises are common symptoms.
2. Can transmission repairs be done on-site?
Some diagnostics and minor repairs can be done via mobile truck repair, but rebuilds and replacements are typically done in-shop.
3. How do I know if I need a repair or full rebuild?
We perform a complete diagnostic to assess internal damage. Minor issues can often be repaired, while worn or damaged internals may require a rebuild or replacement.
4. What brands do you service?
We work on all major heavy-duty diesel truck brands, including Eaton Fuller, Allison, and other commercial transmission systems.
5. Is transmission service included in fleet maintenance?
Yes. We include regular fluid checks and transmission inspections as part of our fleet maintenance programs.
Our Service Area - Serving All Neighboring Areas
We proudly serve Sanford, FL and all surrounding areas including Lake Mary, Deltona, DeLand, Altamonte Springs, Orlando, Winter Springs, Apopka, Longwood, and more.
Whether you need reliable diesel truck repair or fast RV repair near Sanford, FL, our team is ready to get you back on the road.
On Time Truck Repair Shop is a trusted diesel truck repair shop in Sanford, FL, specializing in diesel truck repair, fleet maintenance, and roadside assistance. Family-owned since 1995, we proudly serve diesel drivers and fleet operators with fast, reliable service backed by decades of experience.