vanum 4wd
 

is there anyway to fix without replacing anything

Fix What??

Need more info, It depends on what is danaged, The vacuum motor ??, The vacuum Lines etc....??

You can replace the vacumm setup with a Cable operated lever !

Just snapped the inner shaft of my two piece long side axle this weekend while wheeling. Mine was vaccum operated and I'd switched it to a cable. It worked good for about 3 years but, now it's time to upgrade. I recommend getting a solid long side axle out of a 97 or newer XJ front D30. This will net you a solid axle shaft in place of the two piece POS you and I both have. It will also net you bigger U-joints at the knuckles. I believe the shafts are a little bigger on the newer D30 as well. I will need to mic a set to know for sure....or ask somebody in the know.