Also, think torque rather than horsepower. An engine's torque rating is a truer indication of its ability to work for you. Ideally, you'd like an engine to develop high torque at a relatively low engine speed-say around 2,800 to 3,500 rpm. The engine's torque is harnessed by the transmission. Many 4x4 types opt for manual transmissions because of the extra gearing they provided.
Most manuals offer five forward speeds with overdrive for improved fuel economy.
Fortunately, many of those problems have been rectified, and manufacturers have been introducing new four-speed electronic automatic overdrive transmissions. Nearly all 4x4s now come with standard autolocking hubs. If you want manual lockers, you'll have to special-order them. As for those special packages mentioned earlier, carefully evaluate each one, especially if you plan to tow a trailer. In some cases, you may have to order more than one optional package to get all the required equipment.