Transmission issue

[ktblogistics]

had very similar issiue ( exacly same sysmptoms ) with endurance transmission, it was damaged wiring at transmission plug, when you disconnect it it is really difficult to pull it down for inspection but when i removed some zipties i was able to pull it down enough to have a closer look, had rubbed wires that caused intermittent loss of communication, wiring rubbed against plastic cover at 90 degree bend,
plug looks non serviceable but you can disassembly the plug and remove pins and change wiring, i replaced the total of 4 wires there,