X5 E53 4.4 Transmission Slipping/Resisting

[marky4.4]

Hi Guys,

I'm new to the Forum, I have a 2003 4.4 E53 and recently I've noticed that going from 2nd into 3rd the car sometimes shudders, when I press the gas pedal she shifts along as normal. I've also noticed a distinct dragging sensation whilst on the highway too. For example I'm doing 60MPH/100KM but there is a resistance to movement of the car, it's as though the car is towing something......the engine itself is running smoothly but there's something seemingly creating a rolling resistance on the car's forward movement.

I've read lots of posts and the nearest indicator I have to my problem is the Torque Converter, the gears change smoothly and there are no grinding noises.

Any help would be greatly appreciated!!

Mark.