On my volvo 850 the steering al of a sudden became hard to turn, i checked the power steering pump and its fine it had enough fluid, and i dont know what could be wrong. also on the drivers side, on the front subframe right in front of the cv boot there is a bunch of grease and i couldn't fine any rips in the boots anywhere, and was wondering if that could affect how the steering is, or if there is another problem. Thanks