Easy flush of your system.
You need two or three quarts of Dextron ATF.
You also need a short section of hose with a bolt in one end, and another short section of hose with a coupler, or short metal pipe in there so you can splice the two hoses together...
BTW, the metal pipe needs to be the same size as the return fitting on the PS tank. (About 1/2" IIRC.)
Ok here goes.
1) Remove the return line from the tank. Plug the return fitting so it's not leaking all over the place.
2) Splice your other hose into the return hose with the short metal pipe. Using clamps is not really a problem if your pipe and hoses are the right size, but clamps will make the job less messy if you have wrong sized stuff.
3) Remove the lid now. (IF you have the lid off before, it's going to make the return line leak like crazy v/s just leak some when you swap over the hoses.)
4) Put the spliced hose end into the 2 L pop bottle, or other container like a windshield washer fluid, or 5 quart oil container... In any case, you want to be able to put all the old PS fluid into it with no mess, or overflow. (Two people really helps out here.)
5) Now with one person pouring fresh ATF into the PS tank, have the other start the car... DO NOT REV THE MOTOR.
6) Notice that the old fluid will be going into the old container, and the new stuff your pouring into the tank will be replacing it in the system.
7) Keep pouring in fresh fluid, it goes down pretty quickly, but don't just pour it all over the place. (Use a funnel if you can't pour without one.)
8) Have your helper turn the wheel from one side to the other while the car is running at idle. DO NOT REV UP THE MOTOR.. If you do, it will pump way too much fluid, and might cause a problem where you can't get the tank full fast enough.
9) As the wheel is turned from side to side, notice all the dark, used ATF coming out? After about two turns from side to side, you should have all new fluid in your system, but I'd use all 2 quarts, or more if you want. (Keep some so you can fill up the system when your done however.)
10) Ok, now you should have new clean ATF coming out of the return hose, so run the engine so the fluid is just below the return fitting, and shut down the engine. (This will stop the pump..)
Remove your temporary spliced in line and pipe, and the plug you had on the return fitting on the tank.
Replace that POS cheap clamp with a real one please!
Top off your tank, and start the car. Check the fluid level, and have the wheel turned from side to side a few times to make sure there are no air bubbles in the system. Check the level again, and your good to go.
If your really anal, you can remove the tank, power/steam clean it, and then start with a very clean tank full of clean fluid, and still dump all the old stuff into a old bottle. I did this when I rebuilt my engine, and had everything apart anyway. The screen inside the tank was pretty dirty, but not so dirty it would have caused a problem with flow or something. (Now it's like new.)
Have fun, and don't let kids drink or play with your old ATF, mark the container USED OIL, and then take it to a local autoparts dealer, and let them dispose of it correctly.
