i have a 1990 mj 4.0 auto 2x4 that im converting to a 4x4 with a i think its a 94 xj and my dad has a 87 mj 4x4. my question is about the rear drive shaft does any one have the measurements for the mj auto mj standred and the xj and can some one send me a link to a conversion with pics please?

 

Look here best bet....https://www.google.com/search?q=xj+c...m=122&ie=UTF-8

 

your best bet is to measure for the driveshafts when the truck is swapped and sitting on its own wheels. this is what I had to do when I had my 2wd shaft cut down for the 4x4. you need to take 3 measurements one with the truck sitting with nothing in the bed. one with around 500 pounds in the bed to make the suspension squat hard. the last one you need to have the rear axle at full drop. i did this buy lifting the rear bumper with a forklift and letting the rear axle hang. when you take you measurements measure from the bottom of the c when the ujoint fits in to the other bottom of the c. if you do that and take it to a drive shafts shop then can cut it down for you cost me only 50$ here

 

Now would be a good time for a SYE kit.

 

What is a sye kit

 

Google is your friend

 

Oh that would be badass if I had the money