03 4.6is transfer case female splines to front driveshaft are worn. the tcase parts arent available to repair the output. I sourced a front drive shaft extension repair but its fit is loose and not ideal on the lwx500. the tcase chain isnt available for the lwx500 or nv125 either. Id like to swap in the atc500 as it was also avialable on the e53. I was planning on using a simple on/off switch to engage the transfer case motor to switch between rwd and 4wd. Anyone done this before?