1999 BMW 740

Transmission problem
1999 BMW 740 V8 Two Wheel Drive Automatic

problem 1.
sometimes while driving the gear hang in gear 4 even when I use the manual it automatically turns to gear 4 and if I park the car and start driving again each shift takes a longer time up to gear 3 and hang there. When I stop the car, switch it off and start it again the problem disapear.

problem2.
when I drive the car for a round half an hour and slow down I hear a bump in the gearbox especially in gear 2. The same thing repeates when I switch off the car and start it again, the problem disapears.