Aaron Kaufman and his team of builders are on the mad dash to get the International Scout ready in time for King of the Hammers. But problem after problem, from redoing the fenders, to leaks, and the car not starting, throws major wrenches into the plan.

Aaron Kaufman and his team of builders barely make it to King of the Hammers in California, where they will put their '71 International Scout to the ultimate test of rock and desert racing. But can Kaufman's Scout be able to take on the pros?

Aaron Kaufman takes on a new challenge to build a Semi-Race Truck. He brings on experts in the field of Semi-Truck racing, Bob Ball and his son Justin to bring the horsepower to the maximum.

The clock is ticking as Aaron Kaufman and his Arclight builders struggle to finish their semi truck in time for race day at Pike's Peak International raceway. Tempers flare and things go wrong. Does this crew have what it takes to make it to the start?

Aaron Kaufman starts his racing adventure at Pikes Peak International Raceway in Colorado Springs, competing multiple races, and his truck is literally falling apart. Will he be able to finish the event or will he have to be towed back home in pieces?

In a flip from racing semi trucks, Aaron Kaufman decides to take a stab at building and racing a rally car. Aaron and his builders try to navigate this fast-paced world they know nothing about - where winning is rare for novices and losing can be fatal.

Aaron and his team are true fish out of water when it comes to building and learning how to race their Subaru Impreza in preparation for the Olympus Rally. Will they be able to meet their deadline and get this car ready to Rally? Only time will tell.

The Olympus Rally in Washington gives Aaron Kaufman and his team a dangerous run for their money as they struggle to just stay in the game. Mishap after mishap plagues them at every turn, and it may be most unforgettable episode of Shifting Gears yet.

Aaron Kaufman sets his sights on taking a Model A Dragster and his Harley WLA to The Race of Gentlemen, a vintage beach drag race with bunch of other hot rod enthusiasts. This isn't his first attempt to hit the Jersey Shore.

With The Race of Gentlemen being only a week away, Aaron and his builders rush to get the Model A Dragster and Harley WLA ready for competition. But problems ensue with the dragster and threaten Aaron's chances again of making it to TROG.

Aaron Kaufman and his team of Arclight builders arrive at The Race of Gentlemen to fanfare and frivolity - with their Harley and Model A Dragster in tow. But things soon take a serious turn as an accident and a serious injury cast a pall over the event.