If you want to heat up the trans fluid quickly, this is what I do. Mine goes on a quickjack and I’m too lazy to drop it and drive around. Parking brake on. Start engine, put it in drive with foot firmly on brake pedal. Raise rpm to about 1800 and keep it there for 5-10 min max. It should be up to temp. I have a temp gauge and it came up pretty quickly. Can’t recall if it was more than 5 min. Also wondering if you can use tow/haul mode to see the trans temp. It won’t have numbers but I would guess a middle rating on the gauge would be good.
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