your front axle shaft on the passenger side is one piece and always connected. its more reliable than the vacuum disconnect in other early XJ's since it cannot disconnect. this does not mean your in 4WD, just that everything is always spinning. and since you have ABS, your front axle has the bigger, stronger u-joints as well. so in terms of strength and reliability, its equal to a 94?+, whenever the bigger u-joints became standard