AudiForums.com - Audi A6 Prob Plz help

Hi Guys

bought a 98 A6 2.4 tiptronic and for the first two month it was fine but then as i was driving home from work one daythe oil pressure light came on as well as the warning light then the car just lost power. When i start the car it takes off fine but then as you drivei here this winding sound and the car kicks in to like a high gear and it takes off extremely slow but then gradually pics up speed.i took it to some agents and they all give me different stories. One says that it could be the ABS and the other says that it's the gearbox and this weekend i took it to this guy that does Audi repairs and he says that it could be the torque regulator. Please can some one help me with this as i am desperate?

Thank a mil