2026 Dynamax DX3 for Sale

The DX3 is the motorhome that defines Dynamax and the Super C category as a whole. It is built on a Freightliner M2 106 PLUS commercial truck chassis with a Cummins L9 turbo-diesel making 360 horsepower and 1,150 lb-ft of torque, paired to an Allison 3200 TRV six-speed automatic, air brakes, and air-ride suspension — so it drives, stops, tows, and rides like the heavy truck it is, with a crash-tested truck cab up front instead of a Class A's flat dash. On top of that foundation sits a residential coach with full-paint exteriors, opposing slide rooms, a king bed, theater seating, a fireplace, and high tank capacities. Five floor plans span roughly 34 to 41 feet, including a bunk-bed family layout. On RV Insider the DX3 is Dynamax's best-rated and most-reviewed model at about 4.5 stars over 12 reviews, with an exceptional 4.9 driving/towing sub-score — owners repeatedly call it 'a truck, and a good one.' The honest cautions are price (this is a $300,000-plus diesel), weight, commercial-style service needs, and a factory-warranty process that one detailed owner found frustratingly slow. For a buyer who wants the original luxury Super C and intends to drive it hard and tow heavy, the DX3 is the heart of the lineup.

Looking for a Dynamax DX3 for sale?

You're in the right place. We don't sell the DX3 off a lot — we work for you, find the cleanest one on the market new or used, inspect it, and negotiate it. Below is everything you need to know before you shop: the real specs, every floor plan, the photos, what it tends to sell for, and a straight read on what owners love and what they grumble about.