The manual stresses: "Only use ZF Fluids." Non-approved gear oil (e.g., generic 80W-90) will corrode the internal copper bus bars and shift rails, causing intermittent electrical faults.

: A complete library of error codes generated by the Transmission Control Unit (TCU), along with step-by-step troubleshooting trees to resolve them. Repair Procedures

Xavier’s eyes widened. “Can you fix it? The deadline—”

: The proprietary software system used for troubleshooting, reading fault codes, and performing functional tests on the transmission control unit (TCU) and actuators. ZF List of Lubricants (TE-ML 02)

Comprehensive lists of error codes to identify sensor failures, shift issues, or communication errors.