It seems like it would be cheaper to find a transfercase on ebay with the sensors attached and replace them from there. Look for trooper/rodeo/axiom transfer cases and see if the part numbers on the speed sensors match, maybe call Merlin at St. Charles isuzu and ask if you can use the trooper/rodeo/axiom ones on the VX? Those sensors going bad seems like a once in a lifetime deal

What does the 5 hour labor entail?