I just replaced my rack last week on my 05 Ram 1500. I didn’t do a flush. Only because one the power steering lines are disconnected from the rack itself, all the fluid drained out of the reservoir which had new fluid in it anyway since I kept on refilling it due to a leak.

 

Can i ask why you guys changed your racks? Was it because of the infamous power steering fluid leak? i have a leak and need to re-fill the power steering pump every 2 weeks. I don't see any hoses leaking, so is the leak coming from a crack in the rack somewhere? Just wondering if I you tried to fix it somehow before deciding to buy a new one.

 

I replaced my rack because it was pouring out fluid. I would start the truck and an almost steady stream of fluid would be coming from the top of the rack. The fluid was coming from the top where the steering shaft connected to the rack.

 

I replaced my R & P last year or earlier this year. It had approx. 85K miles on it. It was leaking out of one of the seals. I believe it was caused by the vent in the cap not working correctly. The system then builds pressure and cannot release it, then blows the seals. There's a few easy fixes for this. Google it and you will see the fixes.