1991 Olds Toronado
OK, I really screwed up! I have been doing restoration and repairs on my car. Including changing the trans fluid and filter and replacing all the oil cooler lines. I have a trans cooler and a power steering cooler. so I have lines that go from the power steering pump to a cooler, then back to the rack and pinion, then back to the pump, and my trans has a line that goes from the trans to the radiator then from the radiator to a cooler and from the cooler back to the trans. anyway.... I hooked up a line that goes from the power steering pump cooler to the transmission. and the trans cooler line goes back to the rack and pinion!! when I started the car I ended up putting 2 and a half quarts of power steering fluid in the pump so now the power steering and the trans is contaminated. the car ran probably for 5 min.
suggestions please!!! I'm an idiot.

I'd tow it to a shop that has a flush machine.
Did the tranny slip or die?

I never put it in gear. started it and the power steering pump was making noise so i added a quart of fluid, kept making noise so I shut it off and went to auto parts store to get another quart. did the same thing. auto parts store again. so it wasn't running long at all. when the pump was making noise I shut it off as fast as i could. so the pump was pumping the power steering fluid through the cooler, then to the radiator then to the trans.the lines go completely around the engine bay, they are quite long, I hope that helps me.

the power steering fluid I was putting into it was clear. afterwards the tranny fluid looked and smelled normal. the power steering resevoir fluid was a reddish brown.

Back in the olden days, it was common with some manufacturers to use transmission fluid in the power steering. Some cars still did the same recently. Their jobs have similarities, and it'* not like you put coolant in the transmission or power steering.

. . . DID YOU?

LOL sorry couldn't resist.

If it were me, I'd hook everything up properly, block the rear tires, put the front of the car on stands so that the tires are off the ground by an inch or more, then:

1. Drain both systems as much as possible
2. Fill both systems up properly
3. Idle the car for two minutes
4. While idling, steer the steering from far left to far right many times. Many in this case is like twenty or more
5. Put the steering to straight
6. Foot on brake
7. Put transmission in "1"
8. Let foot off brake
9. Wait thirty seconds
10. Slowly apply brakes until wheels are stopped
11. Put transmission in Park
12. Engine off

>>>Repeat three or more times<<<

If I'm doing in-my-head math properly, you have 15.625% power steering fluid in your transmission. Doing the above will get it to 1.95% . I don't think that would hurt anything.

If you want to go a little crazy, here'* a chart for reference:

15.625% = Now
7.8125% = After change 1
3.9062% = After change 2
1.9531% = After change 3
0.9765% = After change 4
0.4882% = After change 5
0.2441% = After change 6
0.1220% = After change 7
0.0610% = After change 8
0.0305% = After change 9
0.0152% = After change 10

Hey thanks CathedralCub for the info and advice. I laughed when I saw your joke! Good One! I can handle it.
As far as the car goes here'* what I did.
I flushed it twice and then filled it I did the thing with the power steering and it seems ok. I took the car around the block 2 or 3 times and it shifted perfect. engine was at normal operating temp. about 195 degrees. So hopefully it'* gonna be ok. I may change it again and this time do the filter too.
Something interesting to note, when I emptied the drain pan the old fluid was in, there were streaks that almost looked like water mixed with oil. so I don't how well they are mixing OR maybe the power steering fluid is a little heavier than tranny fluid. I put some of it in a glass jar and some new tranny fluid in another glass jar and they looked identical in every way. smell, touch. and when I emptied them I didn't see any water like streaks. (I'm a very curious person)
if anything changes I will let you all know. wish me luck!

Cool!

Might be synthetic power steering fluid maybe? Just guessing here.

Good luck!

Update. been driving the car occasionally, put about 400 miles on it and everything is fine. Shifts great and steering is fine to. Just wanted to let you know. thanks for all the advice.

That'* great news!

Thanks for letting us know!

No worries power steering fluid is just hydraulic flu hydraulic fluid and the same with transmission fluid transmission fluid just has some friction modifiers that'* some friction modifiers and a red dye otherwise I otherwise it won't hurt a thing Matter of fact there are some guys actually using Caterpillar hydraulic fluid mixed with transmission fluid in their 4t65ES When they're running big power.