How in heaven's name could the pressure be any different in neutral than in gear? The pump turns the same speed either way, and that's where the pressure comes from.
However, "rocking" one of the newer trannys while stuck in snow and overspeeding it in low/reverse WILL fry them, I've seen it.
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!