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Yes I believe it is but I think overdrive and torque converter is pressure regulated. I wired my t\c and o\d up on toggle switchs.
The previous owner of my donor rig wired in a TC lockup switch. I really like it, works well when you're cruising in either OD or 3rd. When I was first driving it I almost killed the motor cause I left the TC lockup switch on.... Won't do that again