I would imagine these are difficult to come by and I have two! Certainly not a way for me to test so offering as Parts or Repair, No Guarantees.

The Voith DIWA Transmission Tester PN 58.2910.18 is a vintage diagnostic service tool designed for automotive use. This specialized tester allows for precise testing and analysis of transmissions, ensuring optimal performance and efficiency. With its reliable brand reputation and specific model number, this tool is a valuable addition to any automotive workshop or garage for troubleshooting and maintenance tasks.