hallo I recently purchase a used Audi a4 Quattro 2002 5hp gear box all wheel drive and seems to work fine, only four days after installing it into the car you drive the car 2 days and the next day the gears are all lit up in solid red and replaced the gear selector but four days after the same problem occurs when diagnosed and errors cleared the problem goes away temporarily and re occurs when you drive and push down the acceleration pedal. any help from any one