Junkyard gearing?
 

So I'm going to be slapping some 33's on my jeep real soon. I don't want to swap the right gears until I have lockers, but I need to save up for that. So if I pick up some 3.55's from the junkyard will they work for me for a while before I pick up some 4.10's or 4.56's? Still haven't decided which one to go with yet... I do a lot of highway driving, and I have the ax-15 trans.

are you talking about just slapping the gears in your current axles? if so then that will not work, whenever you swap gears to another housing you must check backlash, contact pattern etc. on the gears and they will most likely need to be reset, which means you are basically resetting the whole pattern. this is something you will need to take to a shop to have done and will cost more money than its worth.


a cheaper and easier option would be to take the entire 3.55 axle assembly from the junkyard and put it under your jeep

I'd find a set of 4.10 axles to swap in. 3.55's aren't going to be a big improvement with 33's. 2.5 Jeeps with the 5 speed had 4.10's stock.

if he is a manual trans the 3.55 are alot better than 3.07 but yes the 4.10 option is way better