Driving w/o a CDL

Fan hubs

2-speed fan hubs are GREAT for vocational applications. They operate at half speed all the time and kick-up to full speed when extra cooling is required. They also create less dust while operating at half speed when driving or idling on an unpaved surface.

DEF data

Diesel Exhaust Fluid (DEF) is a liquid mix of approximately one-third ammonia (Urea) and de-ionized water. It weighs more than water, and the tanks take up valuable frame space. It can be purchased nearly everywhere, so no need to over spec the volume on a new truck. The fluid is sensitive to heat, being that it contains a high percentage of water. Cold climates do not bother it, engines have a warm-up period where dosing is not required early in the operational cycle, allowing for thaw.