The transmission in a semi-truck does a lot of heavy lifting, but how do they actually work? Here are all the types of transmission these heavy duty trucks use.

The truck features a special message to owner Greg Graham's daughter's late mother, who passed away after a cancer battle in 2012. Graham uses the rig in truck pull competitions.

F or many of you reading this, Transformers may have been the catalyst that pulled you into car culture. From the original ...

These hulking diesel engines power the economy with massive torque, hundreds of horsepower, and hard-driving reliability.