This slight problem is intermittant, after a while when setting off from a standstill, press the gas pedal to go and i get a momentary drop in power. Then the power comes in and it takes off as normal. The vehicle is a 56 plate with 16k miles and is fully serviced. My dealer could not find anything, but they didn't identify that it required a gearbox until they had it for a day. Any ideas on the slight power loss?