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Dynamax DX3 37BH

Class Cbuilt 2013–21Better build tierFindable on the used market
WHAT ONE COSTS
$238,800est. used (2021, 5 yr old; from 5 priced floorplans of this line)
THE SPECS
Length39.2 ft
Height (incl. A/C)12.8 ft
Width8.4 ft
Interior height7.0 ft
GVWR33,000 lb
Dry weightnot published
Sleeps6
Slide-outs2
Fresh water94 gal
Grey water52 gal
Black water52 gal
Air conditioning30,000 BTU
Awning13.5 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 bedroom king bed(Permanent)—
  • 2× Bunk beds(Permanent)—
  • 1× Sofa(Convertible)—
HOW IT'S BUILT: 4/5
WallsAzdel composite
FrameAluminum
RoofStandard
UnderbellyEnclosed

Dynamax (Better tier): Forest River

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
2013–1426,000 lb——
2017–1833,000 lb——
2019–2133,000 lb——
  • 2013Introduced with the DX3 at 26,000 lb GVWR and 12'5" height
  • 2017Freightliner M2 106 with 33,000 lb GVWR; height 12'9"
  • 2019Fresh water 96.5 to 94 gal
  • 2021Final year, sold as dealer stock only alongside the new 37BD
FINDING ONE

Findable: a few listed nationwide most weeks. Why: 9-year production run. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

The original DX3 bunk model, sold from the line's first year until the 37BD replaced it.

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 637RB · 33,000 lb · sleeps 637TRS · 26,000 lb · sleeps 637TS · 33,000 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 37BH 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 37BH 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 dealer and aggregator listings, retrieved 2026-07.