I have a 2003 Terracan Highlander and the front seal has failed on the LHS under the AC compressor where the drive shaft slides in. I only brought the car 50kms before this happened. It has a full service history, but I don't really know the history of the car. I am use to seals failing, however I have had oil go all the way up the breather tube as well which makes me think it was due to pressure. I had a look on the side of the road and the oil level seemed fine now (maybe over filled by mechanic) and I cleaned as much up as I could and did a short drive and no more came out. Tried to limp to town and it did it again. Has anyone else had these seals fail and am I right in presuming this is due to pressurising???