No, it's definately not gearing, I only have a 3.08 in the car now, and third gear is still 1:1 like the 4l60e. It was a very noticable loss of power as if the computer was pulling out alot of timing or I was running out of gas. It never did that with the 4l60e, so I thought maybe there was something trans/computer related. It was cooler out than any other time I have run, I am just wondering if maybe there was a little detonation and the computer pulled out the timing, that is what I am starting to lean towards, thanks.