If that was a 2004R tranny, it is a 4 speed tranny, not 3 speed! I have one in my FB, but I put it in because I have 3:73 rearend gears so it makes highways speeds more bearable. It's gearing is different and gave me more grunt from a start and at highway speeds (roughly 60) I run about 2100 RPMs, which is 1000 RPMs lower then then when I had my TH400 3 speed in the car.