After 195000 miles, the steering wheel became stiffer and it was hard to make a simple turn on a street. Moreover, there was a slow power steering leak and OCCASIONALLY, the steering wheel would not re-coil (it wouldn't turn back to where the wheels would be straight). The steering wheel sticks and stays in one place after making a turn (I have to manually return the steering wheel back straight). I noticed that the U-joint behind the firewall was full of gunk and I decided to clean it (sprayed it with brake cleaner, followed by penetrating oil - this is the dumbest thing I did in my life!) and now the steering wheel almost never coils back to the straight position after making a turn. The rack and pinion was changed (due to the leak I mentioned earlier) and this solved the leak problem but did not affect the steering wheel issue. My question is, can I try to grease this U-joint at this point or do I have to replace it? (it is $400 - available from Toyota only!)