Why are TRANSMISSIONS so damn hard to diagnose ?
Because each one is different.
Because it is not a steady state machine.
Because it uses multiple command controls.
Because each OEM thinks that reinventing the wheel on every transmission is good.
Because the nut behind every steering wheel is different.

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ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/