Well my power steering has progressively gotten worse over the past year and I noticed that as long as I keep the pump filled it works fine but it is leaking out somewhere. My guess is through the seal in the back of the steering box cuz its always wet. Any ideas? if it is that seal in the back of the steering box does anyone have a part #?

 

The seal around the pitman arm shaft on mine is wet, but doesn't leak. I did have the seal around the steering colum shaft leak. It was noticable. When ever the truck sat it would leave a puddle.