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Photo of Rv
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Contact Information

RV Details

  • Price: $75,000
  • Year: 2008
  • Model: DIPLOMAT 40PDQ
  • Listing ID: 7026081
  • Partner ID: 5039969763
  • Posted On: Apr 14, 2026
  • Updated On: Apr 14, 2026

Description

The Ultimate "Pre-DEF" Diesel Pusher. Skip the modern emissions headaches with this legendary 2008 Monaco Diplomat. Built on the heavy-duty Roadmaster RR8R Raised Rail Chassis, this coach offers a "driving on rails" experience that newer entry-level diesels cant match. This unit has been garage-kept, preserving the full-body paint and seals from the Mid-Atlantic elements.

Mechanical & Performance Highlights:
Engine: Cummins ISL 8.9L Turbo Diesel (400HP / 1,200 lb-ft Torque) No DEF Required!
Transmission: Allison 3000 MH 6-Speed Transmission.
Chassis: Roadmaster RR8R with 8 Air Bags and 8 Shock Absorbers for a superior ride.
Generator: Onan 8.0 kW Quiet Diesel on a manual slide-out.
Towing: 10,000 lb. hitch receiver (perfect for large SUVs or trailers).

Interior & Layout (40PDQ Floor Plan):
Quad-Slide Living: Four massive slide-outs create a vast, residential living area.
Condition: Excellent. Non-smoking, no pets, and carefully maintained upholstery/cabinetry.
Kitchen: Solid surface countertops, stainless convection microwave, and 4-door refrigerator with ice maker.
Bedroom: Rear King suite with dual nightstands and large wardrobe.
Convenience: Dual 13.5M BTU ACs with heat pumps.

Recent Maintenance & Upgrades:
Stored indoors when not in use.
Regular service intervals strictly followed for engine, generator, and Allison transmission.
Includes a motorhome-mounted tow bar system, making this rig 100% 'road-ready'.
Dealer Serviced: September 2023 (Including replacement of all slide out gaskets and toppers and inspection and reseal of roof!)
Chassis Battery Replaced: November 2025

Serious inquiries only. This is a premium, turn-key coach for a buyer who knows the value of the 2008 Monaco build quality.

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