loss of power ontakeoff

[troyski]

Have my09 vr that had great pulling power for first 5000 or so km, then noticed having to ride the clutch to take off and a distinct shudder as if not much power getting to the driveline. Went in for service and techs performed a relearn on computer, the difference was immediate and better than new but only lasted about 500k`s before a noticeable loss of power but this time with no shudder. Techs are saying that all the systems are fine and test drive is not revealing any problems but can feel I am not getting the best out of the engine.I carry approx 250kg of work gear in back everyday since new and doesn`t seem to affect performance if I load her up a bit more. Any suggestions out there before I see tech again. Thanks

[snowman]

petrol or diesel?

[troyski]

Sorry forgot to mention its 3.2l t/diesel vr dual cab, have had 3 petrol tritons prior to this one with never a drama, just got sick of pouring fuel through them.