Sry for double posting...

My suggestion is this; dont get a locker. Reason is that on a 4x2 you dont have the LOW range, only HI. You would still need the speed and momentum to get you thru the obstacle, (what ever it will be). That being said it is very easy for you to brake something. Save your money, and trade your truck in for a 4x4. You will be happier and safer in the end.