Eaton/Fuller Transmission Control Module (TCM) 2008-2020: OEM 691961

Dependable Gear Control for Eaton/Fuller Transmissions

What Is It?

The Eaton/Fuller Transmission Control Module (OEM 691961) is a core electronic unit responsible for managing gear selection and clutch engagement in automated manual transmissions. Designed for 2008–2020 Eaton/Fuller systems, this TCM ensures consistent shift patterns and reliable drivetrain coordination.

Why Choose OEM 691961?

The OEM 691961 is developed to match Eaton’s original specifications, ensuring seamless integration with factory hardware and software. It offers dependable communication with transmission sensors and actuators, helping to prevent shifting irregularities, fault codes, and control delays.

Key Benefits

✅ Factory-Matched Fit: Compatible with Eaton/Fuller automated transmissions from 2008 to 2020
✅ Consistent Shift Logic: Coordinates gear changes and clutch actuation smoothly
✅ Durable Electronics: Engineered to operate under heat, vibration, and long-duty cycles
✅ Direct Replacement: Plugs into existing connectors and mounts without modification
✅ Diagnostic Compatibility: Works with OEM tools to support service and system checks

Applications

This TCM supports a wide range of commercial trucks and vocational vehicles equipped with Eaton/Fuller automated transmissions. Whether used in freight hauling, municipal fleets, or construction logistics, it ensures reliable transmission management across diverse road and load conditions.

Installation Notes

Installation should be conducted by a qualified technician. Disconnect battery power before handling. Ensure connectors are clean and secure. After installation, a system scan may be required to sync the new TCM with the engine control module and transmission sensors.

Final Thoughts

The Eaton/Fuller TCM OEM 691961 is a trusted solution for restoring electronic transmission control in your medium- or heavy-duty vehicle. Designed for accuracy and reliability, it ensures dependable operation and long-term system stability—exactly what your fleet depends on.