Quote:
Originally Posted by Kodak
Even from 2nd to 3rd? I assume we're geared the same. When I up-shift from 2 to 3, rpms drop 1k, so a 2500rpm shift puts 3rd at 1500 rpm, which I consider to be the lowest usable end. 4 and 5 are fine at 2500 or even a hair lower depending on the situation. Lately, I've been taking 2nd gear out closer to 3k, except for city driving.
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Especially from 2nd to 3rd. If I'm stuck behind GrannyGoSlow, I'll upshift at 1500 RPM. If I'm pulling out into highway traffic, I may shift at 3000 or more. On a short on ramp, I'm willing to redline it in 2nd. My truck has the 3.73 rear axle ratio and 2% oversize tires, so turns slightly over 1800 RPM at 55 MPH in 5th.
On a perfectly level road, and if I'm not in a hurry, I will be in 5th at 20 MPH. It will accelerate from that speed at 8 or 9 lbs MAP. I don't do that very often, only when traffic prevents more efficient driving technique.