We may receive a commission on purchases made from links. A car is an intricate assembly of tens of thousands of parts, from tiny screws and washers to a sometimes massive engine block that can weigh ...

The NP231 transfer case was introduced in the mid '80s on Jeeps and has been the staple in a number of four-wheel-drive vehicles ever since. The NP231 has 2H, 4H, Neutral, and 4L. When Chrysler took ...