Might have seen this one before not sure though

[jacarter87413]

Hello this is my first time doing this sort of thing and im kinda new to it but i have a couple questions: I own a 98 extended cab ranger with a 3.0 lt 5 spd standard and im guessing a 7.5" rear end the questions that i have are how can i determine the size of my front axle and where can i find a set of durable ring and pinion gears for both the front and rear axle im interested in changing both becouse where i live i have a lot of hills to climb on and off road and the stock gears just arent cutting im using way to much fuel couse i gotta run around in third or fourth gear all the time any help that can be offered would be greatly appreciated thanks