bad power steering pump

[redlinedeath]

so when my brother had my car before i bought it, he didnt know you were supposed to used trans fluid in the ps, till after he sold me the car. He had a leak in one of the hoses so constantly had to top it off, useing ps fluid. now, the pump whines all the time, and steerings a bit tight. will a flush and fill with trans fluid fix this, or is my pump on its way out?

the pearlie at the picknpull i found has one still, and it costs 45 dollars, with a 30 day warranty for exchange or store credit. to risky? should i pick that one up?

*edit, i somehow posted in the wrong area, i thought i was in tech Q&A, mods please help and move me to the correct location?*