i went to grease monkey... very good for oil changes, but i said oil change and tranny flush.
when i came back they did the oil but not the tranny flush. He said some thing about theirs is for newer cars and that i should go to a transmission shop to get it done. some thing along the line of the chemicals are for newer cars and wouldnt do dammage to an older transmission. I didnt ask questions, i just walked out.