Regearing refers to the process of changing your pinion gears and ring gears to a different ratio, which changes the balance of torque and speed. Regearing your Jeep is a crucial step in adjusting the size of your tires since improper gearing can result in more stress being transferred to the axle.

What happens if you don't Regear?

As you said, you will be slower pulling from a stop and less acceleration when you step on the gas, but you will be running a lower RPM at any given speed. If your tranny is a manual, it will wear the clutch a bit faster if you are slipping it more to pull off from a stop as well.

Does Regearing give you more power?

Registered. regearing will put power and mpg back to stock if you choose the right gears. Too high of gears will cause you to rev too high at freeway speeds.