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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 $270,900.

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
YEARSGVWRDRYMSRP
2015–2533,000 lb26,152 lb$459,189
202633,000 lb26,152 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.

OUR TAKE

Triple-slide theater-seating Super C with a pop-up 50" TV and fireplace - the entertaining floorplan.

OTHER DX3 FLOORPLANS
32KD · 33,000 lb · sleeps 434KD · 33,000 lb · sleeps 635DS · 33,000 lb · sleeps 436FK · 33,000 lb · sleeps 437BD · 33,000 lb · sleeps 637BH · 33,000 lb · sleeps 637RB · 33,000 lb · sleeps 637TRS · 26,000 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 37TS on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole DX3 line ↗

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, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.