Dynamax DX3 37TS
Class Cbuilt 2015– (in production)Better build tierFindable on the used market
WHAT ONE COSTS
$459,200MSRP today
Still in production — a used 2023 would run roughly $316,800.
THE SPECS
Length39.2 ft
Height (incl. A/C)12.7 ft
Width8.4 ft
Interior height7.0 ft
GVWR33,000 lb
Dry weight26,152 lb
Sleeps6
Slide-outs3
Fresh water94 gal
Grey water52 gal
Black water52 gal
Air conditioning30,000 BTU
Solar (standard)200 W
Awning18 ft
Fuel100 gal
Generator8 kW Onan diesel
A missing row means the maker never published that figure — unknown, not zero.
WHERE PEOPLE SLEEP
- 1× Rear king tilt-a-bed with gel-infused memory foam(Permanent)71×78
- 1× Tri-fold sofa(Convertible)—
- 1× Residential-style dinette (theater seats optional)(Convertible)—
HOW IT'S BUILT — 4/5
WallsAzdel composite
FrameAluminum
RoofStandard
UnderbellyEnclosed
Dynamax (Better tier): Forest River
YEAR BY YEAR — WHAT CHANGED
| YEARS | GVWR | DRY | MSRP |
|---|---|---|---|
| 2015–25 | 33,000 lb | 26,152 lb | $459,189 |
| 2026 | 33,000 lb | 26,152 lb | $444,122 |
- 2015Introduced, replacing the earlier 37TRS
- 2017GVWR raised to 33,000 lb on the Freightliner M2 106
- 2023Chassis engine switched to the Detroit DD8 7.7L, 375 hp
- 2026Cummins L9 360 hp returns; exterior height 12'9" to 12'8"
- 2027Cummins L9 uprated to 450 hp / 1,250 lb-ft; MSRP $459,189
FINDING ONE
Findable — a few listed nationwide most weeks. Why: 12-year production run; still in production. Estimated from build volume and production span — not a count of live listings.
THE READ
Triple-slide theater-seating Super C with a pop-up 50" TV and fireplace - the entertaining floorplan.
OTHER DX3 FLOORPLANS
Is the 37TS your #1 — or just a spec sheet?
These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.
Rank it against your setup →Data compiled from manufacturer spec sheets, retrieved 2026-07.