Ok, my dad's TJ, (sorry) has really stiff steering lately. I jacked the front end up, and turned the wheel. just as hard. power steering makes it easier, resevoir is full. it's not the power steering. i cannot turn the steering by the tire, with the front end off the ground. what could it be? i'd like to fix it soon if it's simple, so if you hae any ideas, they're much appreciated. thanks.