Tranny will always read high cold with engine off, as oil drains out of the internal parts while it sits. With enough time, they usually drain the torque converter, too, and oil comes out the vent on top, making a mess.

A leak cold only and only in reverse is something else.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!