Just wondering... wish I got better MPG. Mine is a '99 Mazda 4 x 4. Can the rear end ratio be changed?
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The gear ratio can be changed, there is quite a selection of different gears for these trucks and if you change the rear you need to change the front also. What gearing are you running now and what size tire?
Since He's got 99 4X4 prob with a 4.0 or 3.0 he probably has 3.73 gears. Here is the only problem with changing the gear ratio, a loss of power. If you never pull anything or go fourwheeling a lot and you just want mpgs for the highway, changing the ratio would be good for you.
His MPG increase on changing gears all depends on what speed he averagely drives and what size tires he has.
My ratio and tire size.. I've got the 3.0 and the 4.1 ratio... so it's the lowest you can get, right? My tires size is what came from the factory... not sure the exact size. I have determined that the MPG is better than I thought... I can get 24, but that is by going pretty easy on it, but I do need to run the mid grade gas to clear up the pinging. I hear that that pinging on the cheap grade is normal.. and not really good for the engine.
That is the highest gear factory, you could go low so your RPM's run lower on the highway but will take a little more power to get going, you could go to 3.73's or 3.55's to get better mileage but like I said will take a little more to take off from a start.
