This is real easy to figure out. You need to look on your side wall of your tire. It will give the size of your tire. On the differential (requires laying down on the ground and scooty up under your Jeep) there is a tag, attatched by the bolts, that will tell you your gear ratio of your axle. For example; 3.07, 3.73, 4.10, etc. Chances are that your tires exceed the correct gearing, as you say they are over sized. Correct gearing is far more crucial on a 4 banger, than on a I-6, simply because of the difference in horsepower. If you have 33" or larger tires, you will need a minimum of a 4.56 gear ratio.
Too address getting more power out of your motor, gears first, then a cold air intake, several on the market. Then you can open up your exhaust by replacing your factory muffler with a less constrictive aftermarket one. Such as "Flowmaster", etc. Those changes will make a remarkable difference in your get up and go.
As far as locking consoles, see this thread; they finally killed it