If you’re shopping for a new service body truck, two chassis cabs come up more than any others: the Ford F-450 Super Duty and the Ram 4500 Chassis Cab. Both are legitimate workhorses built to carry service bodies, crane bodies, mechanics trucks, and flatbeds — but they’re different animals. Here’s a practical breakdown to help Texas and Louisiana contractors and tradespeople pick the right foundation.
Why Chassis Cab Choice Matters
When you’re investing $15,000–$40,000+ in a service body, crane body, or mechanics truck body, the chassis underneath has to match. Your cab-to-axle (CA) measurement, payload rating, GVWR, and frame stiffness all affect what body fits and how the finished truck performs on the job. Getting this wrong means bodies that don’t fit, overloaded frames, or poor handling on worksites.
Ford F-450 Super Duty: What to Know
The F-450 is Ford’s entry into the Class 4 chassis cab segment. It sits above the F-350 and below the F-550, offering a sweet spot for service body work.
Key specs (2024–2025 F-450):
- GVWR: 14,000–15,000 lbs (varies by cab/axle config)
- Max payload: ~6,000–7,700 lbs
- Available cab-to-axle lengths: 60″, 84″ (Regular Cab and Crew Cab)
- Engine options: 7.3L V8 gas or 6.7L Power Stroke diesel
- Front axle: 7,000 lb rated
- Rear axle: Dana M275 or S135
Best for: Lighter service bodies, standard utility bodies, smaller STI or RKI service body builds, and single-crane setups where total upfit weight stays under payload. Popular with HVAC contractors, electricians, and plumbers running mid-size service body builds.
Watch out for: Payload disappears fast once you add a 1,200–2,000 lb service body. If you’re running a large crane body or a full mechanics truck, you may max out GVWR quickly on a loaded F-450.
Ram 4500: What to Know
The Ram 4500 is Stellantis’s Class 4 chassis cab, available through Dodge/Ram dealers. It’s built on the same platform as the Ram 3500 but with a heavier-duty front axle and higher GVWR.
Key specs (2024–2025 Ram 4500):
- GVWR: 14,000–16,500 lbs (varies by config)
- Max payload: ~9,000+ lbs on some configurations
- Available cab-to-axle lengths: 60″, 84″ (Regular and Crew Cab Chassis)
- Engine options: 6.4L Hemi V8 gas or 6.7L Cummins diesel
- Front axle: 7,000 lb rated
- Rear axle: Dana 80 — stronger and heavier-duty than most competitors at this class
Best for: Heavier service body builds, STI full-size mechanics trucks, lube trucks, and crane body setups where payload margin matters. The higher GVWR gives you more breathing room when a crane, air compressor, and full tool load are on board.
Side-by-Side Comparison
| Feature | Ford F-450 | Ram 4500 |
|---|---|---|
| GVWR | 14,000–15,000 lbs | 14,000–16,500 lbs |
| Max Payload | ~7,700 lbs | ~9,000+ lbs |
| Diesel Engine | 6.7L Power Stroke | 6.7L Cummins |
| Gas Engine | 7.3L V8 | 6.4L Hemi |
| Cab-to-Axle Options | 60″, 84″ | 60″, 84″ |
| Rear Axle | Dana M275/S135 | Dana 80 |
| Transmission | TorqShift 10-speed | Aisin 6-speed |
Which One Should You Choose?
Choose the Ford F-450 if:
- You’re running a lighter service body under 1,500 lbs
- You prefer the Power Stroke diesel or the Ford dealer network
- Your payload needs don’t push the limit of Class 4
Choose the Ram 4500 if:
- You’re running a full STI mechanics truck or lube body
- You want maximum payload headroom in Class 4
- You prefer the Cummins diesel engine (extremely common in Texas oilfield work)
- You’re adding a crane body — the Dana 80 rear axle handles crane stress well
What Bodies Fit Both?
At Star Truck Equipment in Wharton, TX, we install service bodies, crane bodies, mechanics truck bodies, flatbeds, and more on both F-450 and Ram 4500 chassis. Top options include:
- STI (Service Trucks International) Service Bodies — Available in multiple CA lengths to fit both chassis
- RKI Truck Bodies — Made in Houston, TX — great fit for F-450 and Ram 4500
- CM Truck Beds — Flatbed and service body options for both platforms
- Tiger Cranes — Truck-mounted cranes that pair with service bodies on either chassis
Get a Quote on Your Service Body Build
Whether you’re leaning toward the F-450 or Ram 4500, we’ll help you spec out the right body for your work. We serve contractors, oilfield workers, HVAC companies, electricians, and more across Texas and Louisiana.
📞 Call us at (979) 532-1486 or stop by our location at 2507 County Rd 231, Wharton, TX 77488.
Browse our full selection of service bodies, crane bodies, and flatbed truck beds — or contact us online to get started.
