Eaton Fuller Transmission Control Module Repair Service

Name: Eaton Fuller Transmission Control Module Repair Service
Brand: ECU Maverick
Price: 999.00 USD
Availability: InStock

$999.00 USD

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Eaton Fuller K4199RX TCU Repair & Programming Service

Expert Mail-In Repair Service for AutoShift & UltraShift Transmission Control Units
Save $2,000+ Compared to Dealership Replacement

3-5 Day Turnaround Programming Included 6-Month Warranty

Is Your Transmission Stuck in Gear? Flashing "F" on Display?

DON'T replace your TCU until you read this! We've repaired over 1,000 Eaton Fuller units and discovered that 40-50% of trucks sent to dealerships for $3,000+ TCU replacements actually just need electrical repairs costing a fraction of that price.

Our Mail-In Repair Service vs. Dealership Replacement

Our Repair Service

$999

Dealership Replacement

$3,500-$6,500

Complete Repair Package Includes:

Complete Diagnostic Testing - We test EVERY circuit, sensor input, and component
Full Electrical Repair - Solder-level board repairs, connector restoration, power supply fixes
Factory Software Preserved
Testing Under Load - We simulate real-world operating conditions
6-Month Unlimited Mileage Warranty - We stand behind our work
3-5 Day Turnaround - Fast service to get you back on the road

We Repair All K4199RX Part Numbers

K4199RX K-4199RX K4199 K-4199 K3639RX K-3639RX K-3639 K-3639R HP5Z5451916BB ZBFK3639RX FULK4199RX 700482AT

Compatible Vehicles (2005-2016+ Gen 2 AutoShift & UltraShift)

Freightliner

Cascadia (All Models)

Columbia

Coronado

Peterbilt

579

389

387

386

567

Kenworth

T680

T880

W900

T2000

International

ProStar

LoneStar

9400i

Volvo

VNL Series (All Models)

Mack

Pinnacle

Granite

Vision

Ford

F-650

F-750

LCF

Common Problems We Fix

Symptoms:

Flashing "F" on gear display (fault mode)
Stuck in single gear (won't shift up or down)
No neutral confirmation (won't allow engine start)
Intermittent shifting failures
Transmission "power cycles" randomly
Gear skipping (jumps from 12th to 14th)
Dashes (--) instead of gear position
Service light constantly on
Erratic speedometer readings

Fault Codes We Specialize In:

Code 11 (FMI 12)	TECU Internal Failure - True TCU failure
Code 13	Shift Control Communication Loss
Code 36	Engine ECU Communication Fault
Code 56	Input Shaft Speed Sensor Issues
Code 63	XY Shifter Position Sensor Fault
Code 72/73	Failed to Select Rail/Engage Gear
Code 65	Output Speed Sensor Problems

Why Choose ECU Maverick?

Honest Diagnostics - We Don't Upsell: Unlike dealerships that profit from selling new units, we make money by FIXING your existing TCU. If it's beyond repair, we'll tell you upfront before you waste money.
Expert-Level Repairs: Our technicians are ASE Certified with specialized training in Eaton Fuller automated transmissions. We repair at the component level - not just plug testing like most shops.
Real Testing Equipment: We own Eaton ServiceRanger 4.0 Professional diagnostic software and custom test benches that simulate actual transmission operation. Your TCU is tested under load conditions, not just on a shelf.

Before You Ship: Try This FREE Fix First!

40% of TCU problems are actually electrical issues! Try this before shipping:

Clean battery terminals thoroughly with wire brush
Check all ground connections at transmission case
Inspect transmission harness for damage/corrosion
Load test your batteries (should be 12.5V+ engine off)
Check voltage at TCU connector (should be 12V+ running)

Still having problems? Then it's time for our expert repair service.

Our Warranty - Best in the Industry

6-Month Unlimited Mileage Warranty

Full parts and labor coverage
No mileage restrictions (haul cross-country with confidence)
Advanced replacement program (we ship first if warranty issue)
Transferable if you sell the truck

Lifetime Technical Support

Free phone support for installation questions
Troubleshooting help if you have issues
Software update assistance
Direct access to technicians

What Our Customers Say

"Dealership wanted $4,200 for new TCU. ECU Maverick fixed mine for $595 and it's been running 6 months strong. Saved me $3,600!"

- Mike R., Freightliner Cascadia Owner-Operator

"They found a damaged connector that three other shops missed. Fixed it, updated software, had it back in 5 days. Best money I ever spent."

- Dave T., Fleet Manager, 47-Truck Fleet

"Code 11 failure on a 2012 ProStar. ECU Maverick repaired the board instead of replacing. Truck has been perfect for 80,000 miles since."

- Ramon S., Long-Haul Driver❓ Frequently Asked Questions

What if my TCU is beyond repair?

We'll refund your deposit minus $50 diagnostic fee. We'll also offer you a quality remanufactured replacement at our cost ($1,295) - still cheaper than dealership!

Do I need to send my XY Shifter too?

No, unless you have specific XY shifter codes (72/73). We test TCU independently.

How do I remove the TCU?

We provide detailed removal instructions with photos. Most take 15-30 minutes. Location varies by truck model.

Will this void my truck warranty?

No. Magnuson-Moss Warranty Act protects your right to use independent repair services. We provide documentation for warranty purposes.

Do you reprogram for different transmission models?

Yes! We can reprogram your TCU for different transmission configurations. Call for details and pricing.

What payment methods do you accept?

Credit/Debit cards, PayPal, Zelle, Wire Transfer, Business Checks (repair held until cleared)

Ready to Get Your Truck Fixed?

Order Online www.ECUMaverick.com
Search: "Eaton Fuller K4199RX Repair"

Call UsMonday-Friday: 9:30am-4:30pm EST

EmailSend us your fault codes and symptoms
We'll respond within 3-24 hours during business hours

Related Search Terms

Eaton Fuller, AutoShift, and UltraShift are registered trademarks of Eaton Corporation. ECU Maverick is an independent service provider and is not affiliated with or endorsed by Eaton Corporation.

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Getting Started

Submit Your Work Order

Fill out our simple work order form to get your unique work order number. We'll email you shipping instructions immediately. Ship your module to us using any carrier (USPS, FedEx, UPS). Include your work order number with your shipment.

What's Covered

Thorough Bench Testing

Every module is tested before and after repair to ensure full functionality. If your unit tests fine, shows no issues, or is deemed non-repairable, a bench fee applies. We'll contact you before charging anything beyond the base service fee.

What to Expect

Turnaround & Warranty

✓ Turnaround: 2-3 business days (complex jobs may take longer)

✓ Warranty: 6 months on repairs we perform

✓ Programming: Not required—plug and drive

About ECU Maverick — Expert ECU Repair & Programming Services

ECU Maverick specializes in component-level ECU repair and programming for European, domestic, and specialty vehicles. Based in Fort Myers, Florida, we serve independent repair shops, dealerships, and vehicle owners nationwide.

Where most shops rely on reprogram-and-replace methods, we take a different approach. Our technicians diagnose and repair individual circuits at the board level, restoring modules that others write off as failures. This expertise comes from years of reverse engineering and bench testing across thousands of control units.

Vehicles We Service

We specialize in European automotive electronics, including BMW, Mercedes-Benz, Audi, Porsche, Land Rover, Bentley, Ferrari, Lamborghini, Maserati, and Aston Martin ECU repair. We also service domestic vehicles, heavy equipment control modules, and marine electronics systems.

Why Shops and Owners Choose Us

Fast Turnaround — Most ECU repairs ship within 2–3 business days. Same-day rush service available.

Plug-and-Play Ready — Every module leaves fully programmed and coded to your vehicle. No dealer visit required.

Direct Communication — Text or call us and speak with a real technician. No ticket queues, no waiting.

6-Month Unlimited Mileage Warranty — Drive with confidence. Our warranty covers you regardless of how many miles you put on.

Our Commitment

We exist to keep your vehicle out of the dealership and back on the road—with reliable repairs, transparent pricing, and expert support from start to finish. Every job receives the same attention we'd give our own vehicle.

Country/region

Eaton Fuller Transmission Control Module Repair Service