Transmission Gear Slipping problems of the 2008 BMW X5

The 2008 BMW X5 3. 0i has major transmission issues which severely affects the throttle response time and gears slips occasionally. While driving on high way vehicle will not respond to gas paddle and gears slip and make metal noises. Also when vehicle starts from a stop, gears slip and it moves the vehicle backward as if it is in reverse 'r' gear and you have to hit brakes then it will move forward with a severe jerk. Similar gear slipping happens while stopping the vehicle. The hesitation and gear slip are big safety issue as vehicle will not move fast enough as needed (while merging on highway ramp or changing lanes) and could get in to a side or rear collision. Similarly when starting from stop the sudden backward movement could result in crash with vehicle moving behind. The dealer said it is happens with X5 as it a heavy vehicle, which no body would buy as a justifiable reason for a premium luxury vehicle. These issues happen everyday and affect the safe operation of the vehicle on roads. These issues should be investigated and BMW should recall the affected vehicles.