![]() ![]() Thanks, I have been doing some reading up as well.and I must say you brought quite a few insight into this, and thanks for the link to the gear ratio calculator, it was very helpful indeed. Here are some of the links I found for final drive calculator and tire size calculator. I hope it will make first gear more useful on really tight corners, and lower rpm's/better fuel economy on the highway. Since I haven't installed the gear set, I can only give you the theoretical top speed in first of 34 mph for the 3.636. Also, it will be really hard to find the gears. You should consider that a 4.4 will theoretically reduce top speed in first gear to 28 mph, and the 4.7 to 26 mph, at 6700 rpm. ![]() When I asked for advice on the gear ratio, I was interested in better fuel economy and lower noise on the freeway. Someone else will have to comment on the advantage of the wider tire, though I suspect it is useless on the street. (1.8% is roughly equivalent to 1 mph at 60 mph.) I think the extra weight of the tire/wheels will have more effect than reduced/increased tire diameter. Here are a couple things I learned:Ī 235/40/17 tire is only 0.5% slower than the tire you are using now, and a 245/40/17 is only 1.8% slower. I did some research prior to purchasing a 3.636 ring/pinion gear set.
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