Transmission Service

Expert Fleet Transmission Service & Repair

Keep Your Fleet Shifting Smoothly. Professional Transmission Diagnostics, Maintenance & Rebuilds.
From minor fluid services to complete transmission overhauls, we deliver heavy-duty solutions that minimize downtime and maximize gear life.

Request Service

Call Now: (405) 876-7003

Avoid the High Cost of Transmission Failure.

Your transmission is the heart of your vehicle’s drivetrain. When it starts slipping, overheating, or shifting hard, your entire operation is at risk. Ignoring a small transmission glitch today almost always leads to a catastrophic (and expensive) failure tomorrow.

OKC Fleet Services specializes in both automatic and manual transmissions for commercial trucks, and fleet vehicles. We use advanced diagnostic software to communicate with the Transmission Control Module (TCM), identifying whether your issue is a simple sensor failure, a fluid problem, or internal mechanical wear.

Full-Spectrum Transmission Service Solutions

We provide complete care for manual, automatic, and automated manual (AMT) transmissions, including diagnostics, maintenance, repairs, and full rebuild services. Our technicians ensure smooth shifting performance, improved reliability, and extended transmission lifespan for a wide range of heavy-duty and fleet vehicles.

Transmission Diagnostics

We use bi-directional scan tools to monitor gear commanded vs. gear attained, fluid temperature, and pressure sensor data to find the exact cause of the fault.

Fluid & Filter Exchange

Extend the life of your transmission with high-quality synthetic fluids and OEM filters. We remove contaminants that cause friction and overheating.

Clutch Repair & Replacement

For manual and AMT systems, we provide expert clutch adjustments, resurfacing, and full replacements to ensure smooth engagement.

TCM Programming & Repair

Many modern “transmission” problems are actually computer issues. We flash and program Transmission Control Modules to solve shifting glitches.

Driveline & U-Joint Service

We inspect and repair the entire power transfer system, including driveshafts, U-joints, and carrier bearings, to eliminate vibrations.

Seal & Gasket Replacement

Stopping leaks before they lead to low fluid levels and internal burnout. We handle main seals, pan gaskets, and output shaft seals.

Transmission Rebuilds

When repair isn’t enough, we offer complete rebuild services using heavy-duty components designed to outlast factory specs.

Complete Replacements

We source and install high-quality remanufactured or new transmissions to get your vehicle back in service with a full warranty.

The OKC Fleet
Transmission Process

Electronic Analysis

We scan for codes and monitor live data during a test drive to see how the transmission behaves under load.

Fluid Inspection

We check the color, smell, and debris levels in your fluid. This “liquid history” tells us exactly what’s happening inside the gears.

Mechanical Evaluation

We inspect external linkages, mounts, and cooling lines to rule out simple fixes before recommending internal work.

Transparent Estimate

You get a clear breakdown: Is it a solenoid, a sensor, or a mechanical failure? We show you the data so you can make the right call.

Precision Repair & Road Test

After the work is done, we perform a rigorous road test to ensure every shift point is perfect and temperatures are stable.

Why Trust OKC
Fleet with Your Drivetrain?

Specialized Heavy-Duty Techs

We understand the high-torque demands of fleet transmissions.

No “Guestimation

Our diagnostics prove what’s wrong before we pull the transmission.

Quality Components

We use heavy-duty parts that are built for the rigors of commercial use.

Downtime Focused

We prioritize transmission jobs to ensure your truck isn’t sitting in the yard for weeks.We prioritize transmission jobs to ensure your truck isn’t sitting in the yard for weeks.

Service Area

We serve diesel truck owners and fleet operators owners throughout the
Oklahoma City metro area, including

Oklahoma City

Edmond

Guthrie

Moore

Norman

Yukon

El Reno

Midwest City

Del City

Bethany

Warr Acres

Choctaw

Newcastle

and nearby communities

4.9 out of 5 Stars on Google

Don’t just take our word for it — hear from fleet managers who trust us daily.

    
 
 
       Posted on Google  
   
   Matthew James 
 
 
 
 Trustindex verifies that the original source of the review is Google. Guys had me come out and detailed all there vehicles I would highly recommend this company for all of there services very genuine people give them a five star rate they are the best
  
 
      Posted on Google  
   
   Jake Floresca 
 
 
 
 Trustindex verifies that the original source of the review is Google. OKC Fleet Services is an extremely dynamic company to work with.  They not only coordinated the tow/delivery within an hour of me calling but repaired everything the next day to get my truck back on the road.  I cannot recommend this company enough.  Shout out to Lacey for being spectacular keeping me updated and handling my situation with ease.
  
 
      Posted on Google  
   
   Mr Christian 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very professional team..!! Excellent customer services..!!! Reasonable prices..!! 5 ⭐️ they fixed my truck that other shop couldn’t..
  
 
      Posted on Google  
   
   Scott Jones 
 
 
 
 Trustindex verifies that the original source of the review is Google. Honest, friendly kept me informed and stuck to the pricing agreed on. We will go back.
  
 
      Posted on Google  
   
   Christian Krogman 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently transitioned our company maintenance program to OKC Fleet Services, and the experience has been outstanding. They service our semis promptly, their technicians consistently provide excellent work, and our sales manager, Bree, has been exceptional.

Thank you from the entire Ironclad team!
  
 
      Posted on Google  
   
   Patrick Earles 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was in Guthrie, Oklahoma when I had a turbocharger failure on my Peterbilt.
I contacted Garrett and he was able to source the parts I needed quickly. He dispatched John to my location where John was able to remove my intercooler and piping from my truck and take it back to their shop for cleaning and inspection. John returned and installed the turbo, intercooler and piping and had me back up and running with minimal downtime.

I  highly recommend OKC Fleet Services.
Garrett and John were not only friendly, but very professional and highly knowledgeable. Their tools and equipment are second to none. When you hire them you know that you are getting a quality job from quality people
  
 
      Posted on Google  
   
   Ray Burgman 
 
 
 
 Trustindex verifies that the original source of the review is Google. My dash air in my RV was not working. I arrived at OKC FLEET SERVICE about 4:15 pm. They kept my RV overnight. About 9:30 am the next morning they called and had my problem diagnosed and gave me a price to repair it. Less then an hour later they called and said I could come and pick it up. They were very professional and I would recommend them.
  
 
      Posted on Google  
   
   Cody Wright 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’ve had multiple kinds of service done for our fleet, and the staff has been great to work with and the techs have done great work

Best of OKC

2024, 2025 & 2026 Award Winner

NAPA Certified

Truck Care Center

FAQ for Transmission Service.

Quick answers to common questions about our services and processes.

1 What transmission services do you offer?

Complete transmission diagnostics, service, and replacement for all fleet truck types.

2 Do you rebuild transmissions?

No — we do not rebuild transmissions in-house. We handle replacements and swap-outs only.

3 How do I know if my transmission needs service?

Slipping gears, delayed shifting, unusual noises, fluid leaks, or warning lights are all signs your transmission should be inspected.

4 How long does a transmission replacement take?

Diagnostics are completed within one business day, and once a replacement is approved and parts arrive, work begins within a half day. Total time depends on parts availability.

5 What truck types do you service transmissions for?

We service transmissions across medium- and heavy-duty fleet trucks, including all major manufacturers we support.

Don’t Wait for the Breakdown.

Accurate diagnostics. Smooth shifting. Fast turnaround.

Request Transmission Service