Advanced standalone transmission controller for ZF 8HP transmissions (8HP45/50/55/70/75/90/95; 8HP51/76 need additional parts), used to bypass the factory internal TCU. Kit includes PCB board, wiring harness, program switch, LCD display, and 8HP mechatronics cover. 8 driving modes from OEM-like automatic to full race-sequential, manual/automatic/sequential shifting, self-diagnosis with externally displayed error codes. CAN harness variant (for engine ECU communication); other harness options exist for analog/carbureted setups, BMW F-Series and G-Series/Supra plug-and-play, and 6HP-to-8HP upgrades.