got 2001 cherokee with 6.5 long arm kit now i bought 44 hp and 31 spline 9 inch do i narrow the axles or full and do i change the 9 to a 9 hi going with 4,56 gears cause im driving it alot

 

Width will be determined by local laws and preference. I prefer them wide some don't. The hi 9 is great in the front but is weaker when put in the rear and if you haven't priced them more than what you'll want to spend on a non comp rig.

 

it's a good thing you didn't ask a vague question with minimal information
otherwise this would be really hard to answer

if you need them narrower try to run a deep back space wheel. tru hi9 is WAY expensive. start off with this and see how that goes
http://www.ruffstuffspecialties.com/catalog/9F-PIN.html

 

I really don't even know how to answer this.

 

thanks i knew i had heard something like they were weaker in the rear but just wanted some newer insight thanks

 

well dont then

 

Use punctuation and ask an intellectual question.

 

for reals.

you have the money to run a truehi9? do that. http://www.truehi9.com/. if you have enough money to do that, get a J54 kit for the front 44, and run 60 outers.
http://www.jantz4x4.com//jantz.php?p=detail&pro=jana_54

4.56 gears? if youre running 35s and have a 5spd thats fine, but i'd recommend going deeper.. especially with bigger tires. and if youre getting bigger tires than 35s you should get alloy shafts front and rear (id get alloys up front with just 35s... i have nitros in my 44).

 

Are you the literacy police?

 

What size tires are you going to use? What gear to run depends on tire size and how you will use the jeep.Check your local laws about fender flares or tires sticking outside the fenders.If you can run them full width its cheaper to leave them that way.