9. One of the surprises we found was the NP 242D transfer case. Why is this a big deal? Because it has 2WD, 4 part-time, 4-high, and 4-low, the key feature being 2WD! We're not sure how many of the 5.9L had the 2WD option, but it definitely makes us rethink tossing the case-but how long will it survive?