Fuel Econ and rear end gearing....
Hi, I'm new here and picked up an 2002 ranger 2.3L auto 2wd truck for very cheap. All the filters, plugs, spark wires, and coil been replaced and soon will change all the fluids to synthetic.
I check the mpg saturday and got 24.3 doing 70-75 on the highway at 3k rps. Then sunday I got 29.5 doing about 63-65 at about 2500 rpms. To me, that means the rear-end has 4.10 gears.
My main question is, Is it normal for the 5sp auto tranny to turn 2500 rps at 65mph? And how do I know what gearing is in the rear end?