--- title: "Super C Motorhome Repair | Rancho Santa Margarita RV Shop" description: "Freightliner M2 106 and International MV Super C coach repair: painted cab to house color match, tilt hood clearance and heavy rear overhang structural work." focus_keyword: "super c motorhome repair rancho santa margarita" canonical: https://ocrv.me/vehicles/rvs-and-motorhomes/super-c-motorhome-repair/ kind: vehicleType updated: 2026-07-29 source: OCRV Center --- # Super C Motorhome Repair for Heavy Duty Cab Coaches > A Super C puts a **medium duty conventional truck cab** in front of a coach body. The **painted cab against a gelcoat house** and the long rear overhang are what make these coaches specialised work. ## What makes Super C motorhome repair different? A Super C is a coach built behind a Freightliner M2 106 or International MV conventional truck cab. Repair means matching automotive cab paint to a coach builder gelcoat house, respecting a tilting hood, and handling the long rear overhang. Our Yorba Linda shop does that work for Rancho Santa Margarita owners. - The cab is a commercial truck part with truck paint codes - Hood tilt clearance decides where the coach can be parked in shop - Rear overhang behind a tandem or single drive axle is long - GVWR reaches 33,000 lb on a tandem axle build ### Key facts | Item | Value | | --- | --- | | Chassis | Freightliner M2 106 or International MV (Cummins ISB 6.7 or L9, Allison 3000 series, air brakes on most builds) | | Cab finish | Commercial truck paint code (Matched to the coach builder gelcoat and graphics behind it) | | Typical length | 34 to 45 feet (GVWR 26,000 to 33,000 lb) | | Booth capacity | 60 feet (Cab and house refinish happen in one booth session) | | Paint rate | $210 per hour (Plus $55 paint supplies per paint hour) | A Super C is what happens when someone wants diesel pusher capability with a conventional truck in front of it. Dynamax, Renegade, Nexus and Jayco all build them: a Freightliner M2 106 or International MV cab and chassis, then a full height coach body starting immediately behind the cab, usually with a raised roofline and a molded fiberglass transition cap bridging the two. The result tows heavy, sits high and drives like a truck. It also creates a repair problem no other motorhome has, which is a finish boundary between automotive cab paint applied at a truck plant and gelcoat plus graphics applied at a coach plant, roughly at eye level, in the middle of the vehicle. ## Two paint plants, one vehicle, one visible line Nothing else we work on has this problem in this form. The cab left a truck assembly plant finished in a commercial coating system chosen for durability on a work truck. The house left a coach plant finished in gelcoat, or in a paint line with a pearl or metallic graphic, chosen for appearance. The boundary between them sits roughly at eye height in the middle of the coach. Ten seasons of Southern California sun treats those two systems differently. The cab typically holds gloss and the house chalks, so a repair that crosses the boundary has to reconcile two aged finishes rather than reproduce one code. We read both with a spectrophotometer, spray let down panels for each, and choose the blend boundary inside the graphic if the layout gives us one. > **note:** If a shop quotes a Super C cab repair without mentioning the transition into the house, the number is wrong. The blend into the coach body is the part the owner sees from the driveway. ## What happens behind the drive axle A medium duty truck frame was engineered for a body sitting between the axles and a modest tail. Super C builders extend it well beyond that to carry twelve to sixteen feet of coach, and then owners load the extreme rear with a generator, a spare, a hitch and a trailer tongue weight. The rail behind the splice is doing work the original drawing never contemplated. The tells are consistent: a coach that sits nose high unloaded and level loaded, a bay door that only binds when the unit is packed, and cracked paint following a crossmember line under the rear. We measure ride height and frame reference points before touching a body panel, because straightening the tail after the fact is far more expensive than catching the deflection early. 1. Weigh the coach loaded, by axle, as it actually travels 2. Measure frame reference points against the chassis specification 3. Check bay door fit loaded and unloaded, not just empty 4. Inspect the crossmembers nearest the frame splice from below ## Ordering truck parts for a motorhome The hood, grille, fenders, mirrors, glass and cab hardware are Freightliner or International parts. That is good news for availability and awkward news for finish, because the coach builder frequently painted those truck parts into a house color scheme the truck maker never offered. A replacement hood arrives in primer or in a fleet white that matches nothing on your coach. So a hood job here is really two jobs: a truck part sourced through a commercial channel, and a refinish that has to land on the coach graphic. We quote them as separate lines because they carry different lead times and because an adjuster reading one combined number will assume it is inflated. ## Where a Super C differs from a diesel pusher Both are diesel coaches with air brakes and real towing capacity, but the repair profiles diverge sharply. A pusher has one continuous painted shell from bumper to bumper and no cab boundary at all, so its paint problems are about matching a faded pearl across a long flank. A Super C has a shorter painted flank and a boundary problem instead. Structurally it reverses too. A pusher carries its engine behind the drive axle and its frame was purpose built for the coach. A Super C carries the engine ahead of the cab and an extended frame behind, so the deflection shows up at the tail rather than in the basement bay openings amidships. ## Rates and what drives the range Body, structural and paint work bills at $210 per hour with $55 paint supplies per paint hour and $5 body supplies per body hour. Mechanical and electrical work is $260 per hour, diagnostics $285 per hour with a one hour minimum. A written estimate is $150, credited in full against an authorized repair. The range on a Super C is wide for one reason: whether the repair crosses the finish boundary. A dent entirely within the cab is ordinary truck body work. The same dent two feet further back, or anywhere the blend has to reach the coach graphic, adds let down panels, a second color read and considerably more booth time. ## Who owns these coaches Super C owners are usually towing something substantial: a car hauler, a stacker trailer, a boat. That changes the failure pattern we see, because the hitch and the extreme rear of the frame are carrying real load rather than a bike rack. It also means downtime hurts, since the coach and the trailer are one travel plan. The rest are owners who wanted a diesel coach they could see over the hood of and service at a truck dealer. Coming from Rancho Santa Margarita, the 241 to the 91 is the route we suggest for anything over forty feet, and it avoids the tight turns that punish a long rear overhang. ## Questions and answers ### Can the truck cab and the coach body be made to match again? Yes, but not from paint codes. The cab wears a commercial truck finish and the house wears gelcoat or a coach paint line, and after a decade in this sun they have aged in different directions. We read both with a spectrophotometer, spray let down panels for each, and put the blend boundary inside a graphic where the layout allows. ### Why does the fiberglass cap between my cab and coach keep cracking? It is absorbing motion it was never structured for. The truck cab sits on isolators and moves relative to the frame, the coach body is bolted down solid, and the molded cap bridges them. That shear load concentrates on the top radius, which is the thinnest section of the part, so cracks start there and run. ### My Super C sits level loaded but nose high empty. Is that normal? No, and it is worth measuring. It suggests the extended frame behind the drive axle has taken a set. Builders splice rail to carry twelve to sixteen feet of coach back there, then owners load the tail with a generator, a spare and trailer tongue weight. We check frame reference points against the chassis specification. ### Do you have to paint a replacement hood on a Super C? Almost always. The hood is a Freightliner or International part and arrives in primer or a fleet color, because the coach builder painted the original into a house scheme the truck maker never sold. We quote the part and the refinish as separate lines since they have different lead times and different suppliers. ### Does the tilting hood affect how you park my coach in the shop? Yes. Tilting the hood forward needs roughly four feet of clear space ahead of the bumper, so a Super C goes in a bay with open frontage rather than nose to a wall. We plan that at check in, because discovering it later means moving a forty five foot coach to reach a component behind the grille. --- Source: [OCRV Center](https://ocrv.me/vehicles/rvs-and-motorhomes/super-c-motorhome-repair/). Last verified 2026-07-29.