Description

8HP Controller Transmission Integration Now Available for RM-Primis ECU Owners (As of 27/06/2025)

The RM-Primis ECU now includes native control for ZF 8HP transmissions via CAN-BUS, completely free for all RM-Primis users.

Main Features

• Full native 8HP control via CAN-BUS — no external modules or controllers required
• Direct unlock and control of BMW F-Series 8HP transmissions
• No physical modification required to the TCU or transmission hardware
• No need for external programmers for F-Series
• Integration mimics OEM ECU/DME behavior, ensuring OEM-like gearshift logic
• Diagnostic capabilities included:
•   – Read/delete DTCs (trouble codes)
•   – Read TCU firmware version
•   – Monitor real-time TCU status and operational parameters

Shifter Support

• Currently supports:
•   – BMW F-Series electronic shifter
• Other shifters (e.g., Jaguar rotary, Jeep, or aftermarket paddles):
•   – Support can be added on request — just contact us with your setup

Compatibility by Transmission/TCU Type

• Supported Without Flashing (Plug-and-Play)
• BMW F-Series (e.g. F30, F10, F32, etc.):
•   – ZF 8HP45, 8HP50, 8HP70 (typical F-Series variants)
•   – No TCU flashing or external intervention required
•   – Controlled natively via RM-Primis CAN-BUS
• BMW G-Series:
•   – Same physical interface as F-Series
•   – May require minor tweaks to CAN protocol depending on year/model
•   – We offer personalized support to make it work in your G-Series build
• Supported With Firmware Flashing (Free TCU Flash Service Provided)
• BMW E-Series (e.g. E90, E70, etc.):
•   – Must flash F-Series compatible firmware to the TCU
•   – Hardware is usually identical or very similar
• Chrysler/Dodge/Jeep 8HP:
•   – Example: Charger, Challenger, Ram 1500, Grand Cherokee
•   – Flashing is required to convert CAN protocol to BMW/F-Series logic
• Jaguar / Land Rover 8HP:
•   – TCU must be re-flashed for compatibility
•   – Contact us for supported part numbers
• Maserati / Alfa Romeo / Other 8HP Variants:
•   – Flashing required
•   – Depends on TCU hardware compatibility with F-Series firmware

Free TCU Flashing Service

• Ship us the TCU electronics (not the entire transmission)
• We’ll flash it and return it ready to be used with RM-Primis
• Turnaround time typically 1–2 business days after arrival

More Info & Demonstration

See the full implementation, feature breakdown, and diagnostics demo in the video linked below.