Got a build sheet for my jeep that I just bought. Here is what it listed for the axles
DJHS Dana M30/181MM Front Axle
DMDS 3.55 Rear Axle Ratio
DRMP Dana 35C/194MM Rear Axle

Are these worth keeping or should i eventually upgrade?

 

Upgrade your rear axle, but it depend on what u plan to wheel. If keeping it stock then I'm sure your 35 is fine

 

What are your plans for mods?
Lift, tires, gears, lockers, etc will determine whether you will need to upgrade. The Dana 30 up front will be fine up to 35" tires, the 35 in the rear is questionable with anything over 31s, especially if you lock it.

 

What are your future plans for the XJ? Depending on tire size, lockers, and abuse you may need to upgrade. On the other hand the stock axles may be all you ever need.

Well I see the guy above beat me to the needed data.

 

Its my DD but i do want to wheel a bit on the weekends. Mostly just taking it on trails to go camping/hunting. I am thinking 31" tires.

 

You should be ok with that set up I have a d30/35 with 3.07 open / open with 31" and 4.5 of lift and it's been great dofor what I have been doing. I got a 8.25 so I can rehear and lock