hello AGAIN!! i just groveled under my range rover looking to see if my aircon drain plugs were blocked, and noticed oil coming out of the 3 bolt round plate on the bottom of the gear box and from between the engine and bellhousing. the oil is brown, so from the engine, it looks like its coming from the top of the sump. is this another common problem with these 4.0ltr p38's? i seem to be finding quite alot of them..