Limited Seats · Free for Coach Owners
Independent Counsel for Coach Owners

A specialist for everything above the floor.
A specialist for everything below it.

Two factory-trained motorcoach experts, on call to the diesel pusher owner who is tired of going it alone. One phone number. Sixty years of combined experience on the other end of the line.

Save the Date

Inaugural Members' Meeting
· June 2026 ·

Our first owners' gathering convenes this June. Call (605) 605-4017 to be added to the invitation list.

60+
Years Combined
Factory Experience
12
Years Inside
Monaco Coach Corp.
2
Former Monaco
Director-Level Roles
1
Phone Number
You'll Ever Need

A diesel pusher is not a recreational vehicle. It is a residence with a powertrain.

We founded Legacy because the diesel pusher market deserves advisors who answer to the owner, and only the owner.

Between us, we represent more than six decades inside this industry. One of us came up through the chassis side, ultimately serving as Director of Chassis Development and Director of Powertrain Development for Monaco Coach Corporation's entire product line. The other came up through the cabin: twelve years inside Monaco's service and warranty department, RVIA Master-certified, factory-trained on every Aqua-Hot, slide system, inverter bank, and entertainment package the company ever installed.

The best diesel pushers in the world are extraordinary machines. The worst are extraordinary liabilities. The difference is rarely visible from the showroom floor, and almost never visible to the owner standing in a service bay being handed an estimate.

Legacy exists to close that gap. We are not a dealership, we are not a broker, and we accept no manufacturer or service-center incentives. Our compensation comes exclusively from the owners we represent. That structural independence is the entire point of our practice.

Two specialists. One complete coach.

Legacy is built on a deliberate division of expertise. Together, we cover the coach from radiator cap to roof rail.

Above the Floor

Mark Freese

Master-Certified Luxury Motorcoach Interior Systems Specialist

Cabin · Electrical · Appliance · Comfort

Mark is one of the most experienced interior systems specialists in the luxury diesel pusher industry, with approximately thirty years of hands-on service work spanning virtually every major coach brand.

For twelve of those years, Mark worked directly inside Monaco Coach Corporation's service and warranty department, receiving comprehensive factory training on every Monaco and Roadmaster system from the floor up. He holds Master-level certification from the RVIA, earned through a rigorous three-week intensive covering every RV platform in production.

  • Slide-out mechanisms, seals, and topper systems
  • Aqua-Hot hydronic heating: diagnosis to full rebuild
  • House battery banks, inverters, and solar integration
  • Fresh, grey, and black water plumbing networks
  • Residential and RV-grade appliance service
  • 12-volt and 120-volt house electrical systems
  • Auto-leveling and hydraulic jack systems
  • Exterior seal inspection and weatherproofing
  • Interior remodeling: floors, cabinetry, entertainment
  • Warranty claims and factory liaison
  • RVIA Master Certification: three-week comprehensive program
  • Monaco Coach Corporation factory training, all interior systems
  • Aqua-Hot factory-level certification
  • Approximately 30 years of continuous field experience
Below the Floor

Scott Zimmer

Diesel Pusher Chassis & Powertrain Specialist

Chassis · Powertrain · Suspension · Driveline

Scott brings more than three decades of direct, hands-on expertise in diesel pusher chassis and powertrain systems, from the factory floor at Monaco Coach Corporation to his own specialized service operation.

He began at Roadmaster Chassis in 1993 while still in college, then rose through Monaco's engineering ranks, ultimately serving as Director of Chassis Development and Director of Powertrain Development. He led chassis programs across every Monaco plant, oversaw EPA emissions certification with Cat, Cummins, and Detroit Diesel, and ran Monaco's Las Vegas desert test center for nine years.

  • Spartan, Freightliner, and Roadmaster chassis
  • Cummins ISL, ISX, and ISB diesel powertrains
  • Allison 3000 and 4000-series transmission service
  • Air suspension, leveling, and air brake systems
  • Cooling and high-load thermal management
  • Hydraulic systems and parts sourcing
  • Major structural chassis and frame repair
  • Tag-axle service, including post-recall work
  • Generator service: Onan, Power Tech, Kohler
  • Tire load ratings and four-corner balance
  • Former Director of Chassis Development, Monaco Coach
  • Former Director of Powertrain Development, Monaco Coach
  • EPA emissions certification: Cat, Cummins, Detroit
  • Visited every major chassis producer in U.S. & Germany
  • 9 years overseeing Las Vegas desert test operations

What happens to owners without a second opinion.

A coach is a complex, expensive machine. Most owners are not equipped to evaluate the work being recommended on it.

From Our Files. Authentic Account

The $3,800 suspension job that wasn't.

A coach owner called us recently from out of state. A shop had quoted him roughly $3,800 to replace every suspension bushing in his coach, a major undertaking. He drove the rig to us before authorizing the work. We put it on the lift.

The bushings, engineered for a million-mile service life, showed no measurable wear. Not a single one needed replacement. The shop had no intention of actually changing them; the plan was to invoice the labor and send him on his way.

A five-minute phone call to Legacy before authorizing major work is, for most members, the single highest-value service we provide. The membership pays for itself the first time we say "don't authorize that."

Above the floor. Below the floor. A coach has two halves. So does Legacy.

Every diesel pusher is, in effect, two machines bolted together: a residential structure stacked atop a heavy-duty commercial chassis. Most service centers do one well and the other badly. We split the work the way the engineering does.

45 FT · OVERALL LENGTH FRONT SLIDE-OUT SLIDE-OUT FLOOR LINE DIESEL PUSHER TAG AXLE ABOVE BELOW AIR SUSPENSION BASEMENT BAYS REAR-MOUNTED DIESEL A/C · ROOF VENTS FENESTRATION · SEALS 12' 6" HEIGHT
Side Elevation · Class A Diesel Pusher · The Floor Line Divides The Work
Above the Floor

Everything you live inside of.

The cabin and every system that makes it habitable: slides, climate, water, power, appliances, and finishes.

  • Slide-out mechanisms & toppers
  • Aqua-Hot & propane heating
  • House batteries & inverters
  • Solar integration
  • Residential appliances
  • Fresh / grey / black plumbing
  • Auto-leveling & jacks
  • Entertainment & networking
  • Exterior seals & weatherproofing
  • Cabinetry, flooring & trim
Owned by Mark Freese, RVIA Master-Certified Interior Systems Specialist
Below the Floor

Everything you ride on top of.

The chassis, powertrain, and undercarriage, the heavy-truck commercial machinery that moves the residence.

  • Spartan / Freightliner / Roadmaster
  • Cummins ISL / ISX / ISB diesels
  • Allison 3000/4000 transmissions
  • Air suspension & air brakes
  • Cooling & charge-air systems
  • Hydraulic systems
  • Tag-axle service & recall work
  • Generator service (Onan, Kohler)
  • Major structural & frame repair
  • Tire load & weight balancing
Owned by Scott Zimmer, former Director of Chassis & Powertrain Development, Monaco Coach Corporation

The single best phone number in your contact list.

Most of what owners truly need cannot be scheduled. It happens at the side of a highway, in a strange service bay, while reading an unfamiliar estimate. Membership in Legacy is, above all else, the right to pick up the phone and reach a factory-trained specialist.

Members receive direct telephone access to both principals during business hours, plus the right to forward written estimates, photographs, fault codes, and short videos for review at any time. We are, in effect, the second opinion the dealer never wanted you to have, and the technical resource the factory never gave you.

Most members find that a single estimate review, or a single roadside diagnostic call, recovers the year's membership cost many times over. Many recover it in the first month.

DIY Advisor
$38 / month
Billed monthly. Cancel anytime.
The foundation of Legacy membership.
Concierge Elite
$177 / month
Billed monthly. Cancel anytime.
Our flagship membership.

What Every Membership Includes

  • Direct phone access, both principals Walk through repairs, diagnose symptoms, or simply confirm what you're being told is accurate.
  • Estimate review on demand Forward us any quote. We'll tell you whether it's fair, inflated, or unnecessary entirely.
  • Coach systems guidance Operations, maintenance, and "what is that doing?" questions, answered by people who built these coaches.
  • Service-center triage when traveling Stranded out of state? We help locate parts, qualified shops, and the right diagnostic path.
  • Suspension & parts sourcing Air bags, hydraulic components, OEM parts. Scott knows where they live and what they cost.
  • Owner-aligned, always We accept no manufacturer or service-center incentives. Our compensation comes only from members.

Every Legacy engagement begins
with a conversation, not a contract.

Whether you are weeks away from your first coach or a decade into ownership of your fourth, the first call is complimentary, confidential, and always with one of the two principals. There is no intake team. There is no auto-responder. There is the phone, and there is us.

Speak Directly with a Principal
(605) 605-4017