E30M3 Race F10 535 R1150Rt M Coupe
↑ THIS ↑IF I am understanding this correctly... The trans oil cooler has a thermostat, sitting under the bottom of the engine coolant reservoir? For testing purposes, could I not simply remove the thermostat, and ensure trans oil temps are then significantly reduced? If so, then simply replace the thermostat with a new one?
It could also be a bad wiring harness on the valvebody. The temp sensor (not replaceable) is part of the harness...