Dave is struggling to finish a 1991 F-350 in time for Ultimate Adventure.
The guys unpack their old airbrushed jackets and buy some new VW project cars to take out to the sand.
The M715 arrives in the shop to get its poor performance on the road fixed. It then goes to the trail to determine what other issues need to be resolved.
Fred Williams and Dave Chappelle outfit a little Chevy Tracker with tiny tires before heading to the big rocks of Pritchett Canyon.
The Dirt-Heads are back on two wheels in their favorite town of Moab, Utah.
It's the return of Pond Scum and the 4Runner friends of Fred and Dave; they're going snow-bashing in central Oregon to see if their trick IFS suspension will work in the white stuff.
The Dirt-Heads decide they want to build a car-crushing monster truck.
The Dirt-Heads plan is to winch a Chevy K5 Blazer on a trailer and head to the desert for some four-wheeling, with stops on the way to get it running and modified.
Fred and Dave let their camera crew pick out a project truck to wheel in Kansas.
Fred and Dave want to get in shape in a fun way, with mountain biking; the guys come up with a plan to turn a 4x4 van into a shuttle bus for getting up to the top of the hill.
The guys are on the hunt for Colorado's finest four-wheeling trails.
It's time for the Dirt-Heads to build a YJ for Dave; they'll have to undo a fair bit in just a few days to turn Butter Jeep into a trail machine, before heading to Oregon's Tillamook Forest.
The Dirt Heads decide to turn a little Suzuki Samurai into a pickup truck. After their adventure in Indonesia the year before, they want to duplicate the tiny truck build in the US. Can they chop and weld the Sammy into a longer, stronger off-roader?
The guys see if a big SUV beats a small SUV and a trailer for car camping.
The guys are planning a rock crawling weekend in the Idaho outback, but first they need to get Dave's truck in crawl mode with lower gears.
Fred and Dave hope to fix up a rusty Range Rover Classic to explore some high mountain trails in Colorado.
Fred Williams and Dave Chappelle build a trash-hauler off-roader then head to the dirt to help haul garbage away.
The V-10-powered rock bouncer the guys built in Alabama needs to come home, so they have it hauled home where they transform it into a nitrous-boosted mud machine; the Dirt Heads need to find a mud hole to test it out in.
To combine both Dave and Fred's favourite things, Fred picks a strange cab-over-style Isuzu and the guys turn it into an off-road machine in under a week.
In order to make it to the Moab Easter Jeep Safari with his Ford GPW Flatfender Jeep, Fred gets Dave into the shop for some old-school knuckle bustin'.
Fred Williams and Dave Chappelle start in Bend and attempt to ride two Honda three-wheelers all the way to the Oregon coast.
The Dirt Heads take a V8-powered Nissan Armada and remove almost a ton of weight to make it climb big dunes with ease.
The guys find themselves stranded in Idaho with a set of 37-inch tires.
The Dirt Heads try to tackle Fordyce, a challenging trail in Northern California, in the 2003 4Runner they built to clear 40-inch tires.
When Dave brings home a crusty old Bronco, he and Fred want to get it running and then attempt the toughest trail near town.
Fred and Dave have been daydreaming of improving on a Humvee they built years ago; they're back in the shop to build a more nimble machine, then out to the desert to see if their truck can keep up with a top-of-the-line UTV.
Fred and Dave blow the cobwebs off of two of their favorite muscle cars, the Mad Maxxis and the Dirt Pacer.
It's time once again for Dave to surprise Fred with a project build; this time, they find a trusty old Toyota in Louisiana and transform it into a Baja-influenced racing-style Ford.
The guys are in Indonesia to build a truck that isn't available in the U.S.
The guys revive the Dunkin' Dodge for a quest to seek the Holy Grille.
The guys take an F-250 out on the trail but find more snow than expected.
Fred and Dave wanted big power for the sand dunes so they started with a drag truck with a rowdy V8; all they had to do was transform the rest of the truck into a dune-slaying machine.
Fred and Dave deliver supplies to a friend who's been quarantined in Idaho.
A 2003 Chevy Avalanche has been through the wringer over the years, but it's time for one last adventure; Fred Williams and Dave Chappelle see if it can stand up to the challenge of running 21 Road in Western Colorado.
Fred and Dave drive home a wacky stretched a CJ-5-truck-thing that wants to fall apart at every turn; the Dirt Heads won't give up on their goal to make it back to California.
The Dirt Heads fix up Dave's red Chevrolet to clear 40-inch tires and head out to find bigger rocks; Fred and Dave order big rubber and head to Johnson Valley to attempt the Backdoor Trail.
Fred Williams' 1986 Toyota rock crawler, Clampy, has been sitting for about five years and it's time for an adventure; Fred and Dave Chappelle blow off the vehicle's cobwebs and head out from California to find every type of off-road terrain.
Fred arrives at Mawdco, an off-road junkyard in Idaho, where Dave has picked a surprise project.
Fred and Dave venture to Colorado for ice racing.
Fred and Dave build custom Jeep XJ Cherokees for the Cheap Truck Challenge.
Exploring in off-road adventures in a wide variety of vehicles.
In order to fix the Off-Roaderhome, Fred and Dave swap in big horsepower engine.
Fred Williams and David Chappelle show what to do when one hopes to inherit a prerunner truck but gets a four-door wagon instead; by the end of the show, mom's wagon is transformed into a dune machine.
Driving a 4x4 into a pond, river or lake isn't a good idea; Fred Williams and Dave Chappelle drag a Dodge truck out of a pond and go through all the steps of getting it back up and running again.
The guys transform a Scout into a trail machine with a house on the back.
Tube Sock, the 1997 Jeep Wrangler, gets 24 new tires in an effort to give it the buoyancy to float on the Susquehanna River and drag-race a paddleboat.
Fred and Dave demonstrate how to build a rockcrawler in the driveway.
Fred Williams and Dave Chappelle get their hands on a new Jeep Gladiator and turn it into the Gladia-Tow; the guys head out into the wilderness to bring back an old Jeep truck that is buried in the woods.
Fred Williams and Dave Chappelle decide to build a budget bouncer from a Dodge Truck with a V-10 engine, calling it the "Rock Viper."
The Dirt-Heads choose a big Dodge diesel mud truck on 65-inch tractor tires to fix it up before they go experience the mud life in Okeechobee, Fla.
Fred and Dave decide to build a four-wheel-drive motorhome; starting with a 1975 Winnebago Brave RV, the guys attempt to build a monster house on wheels.
Fred and his crew transform thew new Jeep JL Wrangler.
Fred and Dave head to Oregon to find a junkyard truck to take out on the dunes, but they quickly learn that junkyard 4x4s are in the junkyard for a reason.
Fred and Dave head to a friend's ranch, where they discover a derelict 1979 Ford van that they are determined to transform into a ranch truck that their friend will be proud to drive.
Fred and his crew attend a Yellowstone Off-Road Racing event.
Fred and Dave head to Montana to rescue a farm truck but, the 1945 Chevy truck is modified for farm use and is made to drive backwards, making for a difficult journey through Big Sky Country.
Fred and Dave head back to Alabama to redeem themselves in their revamped V-10 powered Rock Viper with better suspension, a new transfer case and a modified roll-cage.
Fred and Dave see how far they can get on California's 22-mile Rubicon Trail in 45-year-old 4x4s equipped with just a winch.
Fred and Dave drag home an Isuzu VehiCROSS for $3,000 and have three days to get it ready for some off-roading in Pennsylvania.
Fred and Dave transform their junkyard Jeep into a trail monster; to test its new abilities, they head to the desert to see how well it rock-crawls.
Fred and Dave bring a Chevy Avalanche back to life.
Fred Williams and Dave Chappelle enter a junkyard with a battery, some gas, big tires, and a pile of parts with the goal of driving a Jeep home.
Fred Williams and Dave Chappelle embark on an overlanding trip of epic proportions on small motorcycles.
Fred experiences the new Toyota Tacoma.
Fred Williams' garage-find 1961 Willy's Wagon has been sitting with bad brakes and a tired drivetrain ever since a prior engine swap, so it's time to set that straight.
Fred Williams and Dave Chappelle are going to figure out whether, with a few modifications, a military surplus Humvee is a great desert machine or an awful off-roader.
Fred and Dave travel to Oregon for some off-road fun.
Fred Williams and Dave Chappelle start with a '94 Ford F-250 from IronPlanet and transform it into a more capable off-road machine in just 48 hours to fit 37-inch General tires.
Fred Williams and Dave Chappelle pick up a military Unimog in Indiana with a few days to get it to Memphis for a big truck show; it isn't the on-road dream machine they were hoping for, so they shift the Mercedes into low range to see what it can do.
Fred Williams and Dave Chappelle hitch a small boat to the back of a Yamaha Wolverine UTV and head to New Mexico; the plan is to explore the Southern Rockies, find a nice mountain lake, and maybe catch some trout, but that might not be it.
Fred challenges Frank to an off-road race.
A 1972 Wagoneer that's been parked for 13 years; a wild winter road trip starting with a garage tune up of the old Jeep, and ending with winching rescue in a snowy winter land.
Fred and Dave attempt to build a vehicle that can handle all type terrain.
Fred Williams and Dave Chappelle transform a 1993 Ford F-350 into the monster truck on massive Mickey Thompson 54-inch tires and take it to the toughest rockcrawling trails in America, Johnson Valley, Calif.
Fred and Brian venture to Oregon to rescue a 1960s dune buggy.
Fred's 1997 Jeep Wrangler that TJ affectionately calls Tubesock was in need of a new engine; Fred wanted to recreate a crazy stunt from the '50s by driving his jeep underwater, so he swaps in a new Cummins ISF2.8 diesel engine.
Fred and his friends compete in buying, building and beating up a pair of inexpensive 4x4s in the annual Cheap Truck Challenge.
Fred and Dave modify a 1976 Cadillac Eldorado to handle the dirt in Palm Springs, California.
Fred Williams calls in all his friends to help put his 1986 Chevy Army truck back together for an adventure to a big state; they add a big-block engine, big portal axles and a big new suspension.
Transforming a Diesel Jeep Wrangler Tubesock into a trail and street jeep.
Fred joins forces with the boys from Surfer magazine for a Baja adventure.
Fred and his crew transform a 1986 Chevy K30 military truck.
Fred is on a mission to find his newest project car; he gets wind of a barn-find, a 1961 Jeep Willys Wagon and is determined to bring it back to life with all new upgrades.
Fred prepares his orange Jeep for the Annual Easter Jeep Safari.
Fred meets Mark Smith, an adventurer who helped develop the Jeep lifestyle.
Fred journeys cross-country in his Toyota Tundra.
Dirthead Fred and Dirthead Dave revive their off road club.
Fred and Dave build a post-apocalyptic 4x4 muscle car.
Fred and his team prepare for the annual Ultimate Adventure trip.
Fred reveals how to be a better Jeeper to his friend Joe.
Fred finally tests out his Madd Maxxis Off Road Runner.
Fred explores Hawaii in his Jeep Wrangler Tube Sock.
Fred Williams rescues an old ranch Jeep in Texas.
Fred and his three dogs travel on a road trip across America.
Fred transforms a 1986 Pace Arrow Motorhome into a giant go-kart.
Fred tests out the power of his transformed 1986 Pace Arrow Motorhome.
Fred ventures to Utah for the annual Moab Easter Jeep Safari; before arriving, he needs to figure out a way to modify his Jeep and transform it into a tough rock crawler.
Fred travels to Alabama to experience an off-road adventure with his mom.
Fred participates in the Cheap Truck Challenge.
Fred reveals the truck participating in the 2014 Ultimate Adventure.
Fred transforms a 1970's Ford Bronco with Iain Harrison.
Fred ventures into the wilderness to check out a 1929 Ford Model-A.
Fred pits a 2013 Jeep Wrangler against a 1951 CJ-3A on a Pennsylvania farm.
Fred continues his work on the Alabama Army Truck.
Fred says goodbye to the Alabama Army Truck with a mud bath.
Fred begins work on a custom ride for his weeklong off-road adventure.
Fred compares a 1946 Willys Jeep to a John Deer Gator.
Fred goes rock crawling in his 1986 Toyota pickup that he calls Clampy.
Dave and Fred go ripping around in the desert of Southern California on some Baja Bugs.
Fred Williams up-fits and outfits one of the coolest 4x4s on the market today -- the Ford Raptor. Raptors are high-performance desert machines but we found one that earns its owner a living each week.
Fred travels to California for the annual King of the Hammers event.
Fred meets the beat-up 1951 "Ugly Jeep" that almost flunked him.
Fred introduces us to his new '93 Land Cruiser he plans to fix up.
Fred joins his friends Rick and Harry for a new Cheap Truck Challenge!
Fred adds a four-inch lift kit to a 2008 Jeep Wrangler Unlimited.
Fred and his crew attend the Moab Jeep Safari in Moab, Utah.
Fred Williams takes to the mountains of Mammoth in his 1965 Dodge M37.
Fred heads to to meet up with fireman Ken Hanna.