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[ NOTE from Darin: split this thread off from DRAG-REDUCTION vs BSFC ]
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Good call
Was getting pretty off topic.
Cost prohibitive, yes, but still a consideration for when repair/replacement becomes necessary.
I'd have to check what my current 65 RPM is; been a while since I drove that fast. I'm @ ~2100 RPM doing 55 MPH with the current auto.
*edit* that calculator is pretty handy. So, by inference from the calculator, I'd actually want a lower final drive to increase speed at a given RPM?
*edit again* according to the repair manual the 05 has the C59 manual with the 3.941 differential gear size. My auto has a 2.962 differential gear size. By using the calculator and crazy extrapolation, if I could get the 5 speed gear ratios with the auto's differential, I'd be better off?