Those relate to your transmission, and, the Gryphon manual is misleading in my opinion. I THINK the output shaft is the drive shaft and the turbine shaft is the input to the torque converter. If you are in 4th gear with everything locked up, the OS speed will be less than the TS speed.
The manual says if they are the same, there's no "slippage", but I think this only applies in 3rd gear with everything locked up.
- Jack
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