Hi there, I know this is an old thread, but I wanted some expert advice! I picked up an 05 Passat 1.8t 5AT 4Motion wagon recently. 127k. I've never owned an auto, so I'm not sure if this behavior is normal. When I have the car in TIP mode in 4th gear and hit the gas, the RPMs jump by about 200. Car accelerates normally. In 5th gear the RPMs jump by about 100. Car accelerates normally. In D while cruising in 5th under partial throttle, the RPMs will jump by about 500 until I really nail the gas, then it'll kick down into 4th.Some slippage in the TC is normal. There is a Reg mode that allows for up to 510rpm of slip in gear. To my knowledge it was put in for fuel economy and comfort purposes in that it keeps the tranny from downshifting if there is a small throttle application.