If the chassis has an air compressor (air brakes), then a dryer should be specified. FMVSS 136 Phase 1 mandated ESP/ESC starting Aug 2017...

Remember the power divider function? On a set of two or three drive axles the incoming power is most often split in half going into the...

Axle ratings are posted on the door label. These values represent the maximum capacity for the axle, based upon the lowest rating of the...

It is important to have a sicker in the cab door jamb that indicates this vehicle complies with California and U.S. emissions as opposed...

Have you seen yellow and red dots on new tires? These dots identify characteristics impacting balance of the tires. Companies which do...

Have you always wondered if buying premix 50/50 antifreeze is a good idea as compared to purchasing concentrate and mixing yourself? The...

Engine fans are key to proper cooling. They work by pulling a tremendous amount of air over the fins in the radiator. Most engines today...

Most all systems include a pickup tube which pulls fuel from near the bottom of the tank, using a ½” to ¾” line connected through the top...

Ever dust an engine? Can you over change the element? When is the proper time to replace? Many maintenance facilities change air...

Trailer gap is measured from the nose of the trailer to the back panel of the sleeper. Sleeper extenders are not a consideration for the...

Most tractors today come equipped with an Automatic Traction Control (ATC) system and the functionality is optional on most all of...

The Federal Government has required most tractors to have an Antilock Brake System (ABS) since March of 1997. The legislation extended...

What is the purpose of a lubrication pump in a tandem drive axle set? There is a theory that this pump sends lube to the outer ends, this...

FMCSA 49 CFR § 393.67 - Liquid fuel tanks. Fuel tanks, 25 gallons or more, are required to meet FMCSS standards and indicate so on the...

These terms refer to the acceptable overload value of the steer, drive axles and respective suspensions temporarily encountered when lift...

ESC/ESP (Electronic Stability Control/Electronic Stability Program) are essentially the same product, the particular name depends on the...

The SAE J560 (black or green) plug has been used since 1951 to power the trailer functions: Ground, Side Marker Lights, Left Turn, Brake,...

Winter fronts can increase the aerodynamic characteristics by directing ram air around the hood. Additionally, some of them look great,...

Fuel filter maintenance is more important today, than any time in the past given the common rail design and tight tolerances. See below...

In cold weather, there are a number of methods to warm the fuel to help eliminate clouding/gelling. Cloud point refers to the tendency...