Hey, I have a 99 wrangler sport, stock automatic. It needs new shocks and I’m thinking of getting a 2″ suspension lift while getting the shocks. I would also like to put 33″s on it after the lift and all. Will I have any rubbing issues? And how much power loss would I have if any? Should I go up to a 4.5 geat ratio? I’m unsure of my current gear ratio(Tried looking but couldn’t find any numbers). I am also very new to jeeps and have no experience with it. I already have trouble going 50 up even slight hills. Thanks alot.
To fit 33-inch tires on a Jeep TJ, you really need a minimum of 3 inches of lift. A 4-inch lift is preferred to prevent rubbing (especially if you plan to take it offroad). A 2-inch lift is not enough for 33s...you'll have some significant rubbing issues.
The amount of "power loss" that you get from increasing the tire size will really depend upon your current gear ratio. For example, if you have 3.07 gears currently, the power loss when adding 33s will be much more pronounced than if you've currently got 3.73 gears. There is a little debate about what the "ideal" gear ratio for 33-inch tires is. Some argue 4.10 gears and others will argue 4.56s. Personally, I'm in the 4.56 camp...that's what I run in my own Jeep (and I'm very happy with that ratio). That being said, if your Jeep has the 3-speed automatic transmission (I'm not sure which one you have) you should lean towards the 4.10s. 4.10s are better suited for the 3-speed automatic and 4.56s are better suited for the 5-speed manual when running 33s.