Gear Box Leak ?
 

Whilst under the car fitting a new exhaust a mechanic friend of mine told me that I have a slight leak coming from the front driveshaft. He said it looks like it is weeping rather than a full blown leak and it is deffo transmission fluid.

He thought that it may very well be an oil seal gone inside cos the box itself is sweet as a nut and there is no whining or nasty noises coming from it. Does anyone know whether there is such an oil seal or similar and if so does anyone have the part number cos now I know its there its something I want to sort out :(

Cheers in advance