.warner bros it started making a wining sound like it needed power stering fluid

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.warner bros it started making a wining sound like it needed power stering fluid it didnt need power stering fluid than the.boise was coming from.the transmittion.side of the van and the wining would get worse when I had my foot on the gas I.changed my filter and fluid then I realized it would have the.worse time shifting when.I got about 25 or 30 mph then.it would go to 40-50 or so it wouldnt do anything irregular....what is it ? What do I do? Is it my transmition?