Which explains why no difference in MPG between the various final ratios ??
For comparisons sake, those monster Sasquatch tires will have a much larger effect on fuel mileage then a couple tenths of a point in gear ratios discussed here.That’s what most are saying. Nominal difference in MPG.
The 4.70's will equalize almost everything else, but the weight and rolling resistance will drag those MPG numbers down...plus the suspension lift is a MPG penalty also.
4.27 vs 4.46 and no other drive line changes??? 32" tires, Ford 10spd auto.
Let's take a look.
(Edit to add that this came from http://www.grimmjeeper.com/gears.html )
Road RPMs at given speed in miles per hour | 10 | 35 | 70 |
---|---|---|---|
Gear 4.27 | |||
1 | 2103 | 7362 | 14723 |
2 | 1338 | 4683 | 9366 |
3 | 962 | 3368 | 6735 |
4 | 806 | 2819 | 5639 |
5 | 680 | 2381 | 4762 |
6 | 573 | 2005 | 4010 |
7 | 448 | 1566 | 3133 |
8 | 380 | 1331 | 2663 |
9 | 309 | 1081 | 2161 |
10 | 286 | 1002 | 2005 |
R | 2179 | 7628 | 15256 |
Road RPMs at given speed in miles per hour | 10 | 35 | 70 |
---|---|---|---|
Gear 4.46 | |||
1 | 2197 | 7689 | 15378 |
2 | 1398 | 4892 | 9783 |
3 | 1005 | 3517 | 7035 |
4 | 841 | 2945 | 5890 |
5 | 710 | 2487 | 4973 |
6 | 598 | 2094 | 4188 |
7 | 467 | 1636 | 3272 |
8 | 397 | 1391 | 2781 |
9 | 323 | 1129 | 2258 |
10 | 299 | 1047 | 2094 |
R | 2276 | 7967 | 15934 |
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