I've replaced rack and pinion twice, pump, pressure switch and flushed with Mercon V. Idk what else to replace except the hoses but there isn't a leak in the system. Van has 155k if that makes a difference. Original issue would come and go. Finally never came back so I checked to see if fluid was low, fluid was black. I proceeded to change out the fluid first with no luck. Pump never whined so I next replaced the RnP. I kept switching everything out, but still no luck. If you can think of anything else to check for please comment below.
thanks in advance.