No... The valvebody is what directs fluid and shifts the gears on the tranny...I have the kit and I have an extra valvebody that has already been drilled to spec.. normally you would use the valvebody that is on your car now the recommend you to take it off the bottom of the tranny and modify the one thats there....hope this helps if not find an transgo install on the web search for transgo 4r70w installation You might be able to understand it from there.. however you do not need the extra valvebody but I would get it anyway since all you need to do is drop the other one and put this one in..saves alot of time...Let me know
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