I appoligize if this is in the wrong place, but i have the tranny dropped out of my 02 silverado with 150,000 miles. I also have the torque converter removed so that i could replace the front pump seal. I do not know what the previous owner used for atf, i do know that they had been topping it off with something because it had an atf leak, The tranny had also been removed before. I am planning on changing the internal filter and refilling with Shell Spirax A295. I think i should be okay but I wanted to check with people that have more knowledge than I.