2004 Oshkosh S Series Mixer Truck: Workhorse Proven Over 38,000 Hours
The 2004 Oshkosh S Series front-discharge concrete mixer truck delivers serious mixing capacity for operations that need reliable drum rotation without the premium price of late-model iron. Listed at $26,000, this 4-axle glider unit pairs a rebuilt chassis with a Mack E7 485 HP engine and an HT740 4-speed automatic transmission — a powertrain configuration known for durability in high-cycle concrete delivery.
This is not a fleet queen. At 38,265 hours, this mixer has worked. But it has also been maintained. The seller provides maintenance records, which matters more than low hours on a 20-year-old truck. For contractors, ready-mix producers, or fleet managers evaluating cost-per-yard delivered, this S Series represents a capital-efficient entry point into front-discharge operations.
Key Specifications
| Specification | Detail |
|---|---|
| PE ID | PE-45932 |
| Manufacturer | Oshkosh |
| Model | S Series |
| Year | 2004 |
| Hours | 38,265 |
| Engine | Mack E7, 485 HP |
| Transmission | HT740 4-speed automatic with hydraulic torque converter |
| Axle Configuration | 4-axle (2 drive, 1 drop axle, 1 steering) |
| Rear Axle Ratio | 5.38 |
| Drum Capacity | 11 cubic yards |
| Brakes | Air brakes |
| Suspension | Rigid |
| Fuel System | Mechanical |
| Drive Configuration | Glider (new body on rebuilt chassis) |
| Class | Class 8 |
| Air Conditioning | Not equipped |
| Condition Score | 6.0/10 |
| Condition Tier | 2 |
| Listing Price | $26,000 |
Condition Assessment: Tier 2, 6.0/10
This Oshkosh S Series carries a Condition Score of 6.0 out of 10 and falls into Condition Tier 2. On Proxy Equipment's scale, Tier 2 indicates equipment that is mechanically functional and job-ready with visible wear consistent with age and application. This is not a restored truck, nor is it a project. It occupies the practical middle ground where most productive concrete mixing hours get logged.
The 38,265-hour reading reflects two decades of drum rotation, chassis flex over uneven pour sites, and engine hours at idle during loading and unloading. Front-discharge mixers accumulate hours differently than over-the-road tractors — the engine runs continuously during the pour cycle, and the hydraulic system works hard maintaining drum speed on grades.
The glider configuration is significant here. A glider kit pairs a new body with a rebuilt chassis, meaning this truck likely received substantial structural and drivetrain refurbishment at some point in its service life. That rebuild history, combined with available maintenance records, provides buyers with documentation to assess component age and service intervals.
The seller notes one disclosure: no air conditioning. For operators in southern climates or summer-intensive markets, this is a comfort and retention issue worth factoring into total cost of ownership. It does not affect mixing performance but may warrant aftermarket installation or operator scheduling adjustments.
Pricing Analysis: Market Position at $26,000
At $26,000, this 2004 Oshkosh S Series sits well below replacement cost for any new Class 8 mixer — front-discharge chassis alone typically run six figures before the drum and hydraulics. The pricing method reflects auction market comparables, meaning this figure aligns with observed transaction values for similar-age, similar-hour mixer trucks in wholesale and dealer channels.
The value proposition breaks down across three buyer scenarios:
First-owner expansion: A growing ready-mix operation adding capacity without adding debt service. The $26,000 acquisition cost allows rapid payback even at modest daily utilization.
Fleet replacement strategy: An operator cycling out higher-hour units or transitioning from rear-discharge to front-discharge for pour-site efficiency. The S Series front-discharge configuration lets the driver control positioning and chute placement, reducing ground crew needs on certain pours.
Backup/redundancy: A contractor needing a reliable spare mixer during peak season or for remote pours where downtime costs exceed the price of keeping this unit on standby.
The 6.0 condition score and Tier 2 classification suggest this truck will require ongoing maintenance investment — not immediate overhaul, but disciplined PM scheduling. Buyers should budget for wear items: drum liners, hydraulic seals, clutch packs in the torque converter, and brake system components given the air brake specification and 4-axle weight distribution.
What Makes This Machine Stand Out
Mack E7 at 485 HP. The E7 is a mechanical fuel system engine — no electronic aftertreatment complexity, no DEF consumption, no particulate filter regeneration cycles. For operations prioritizing field serviceability and parts availability, this powerplant remains supportable through Mack's dealer network and aftermarket channels.
HT740 with torque converter. Allison's HT740 behind a torque converter provides the launch torque necessary for loaded drum starts on inclines and the shift quality that protects driveline components during abrupt load changes. The 4-speed design is simpler than modern 6-speed electronic units, reducing diagnostic and repair complexity.
4-axle, 11-yard configuration. Two drive axles distribute tractive effort; the drop axle provides weight compliance when empty or partially loaded; the steering axle maintains maneuverability on tight pour sites. Eleven yards matches standard ready-mix batch sizes, maximizing payload efficiency per trip.
Glider provenance. The rebuilt chassis element of the glider configuration means critical structural components — frame rails, crossmembers, suspension mounting points — have been inspected and renewed to a standard exceeding a truck that simply aged in place.
Documented maintenance history. Available records allow a buyer to verify service intervals, identify recent component replacements, and model future maintenance spend with greater accuracy than a truck sold as-is without history.
Who This Machine Is For
This Oshkosh S Series fits specific operational profiles where capital efficiency outweighs specification prestige:
- Independent ready-mix producers serving residential and light commercial markets with predictable, repeatable pour schedules
- Municipal or utility contractors performing curb, sidewalk, and small-structure work where front-discharge precision reduces labor
- Rental fleet operators needing mixer capacity for seasonal or project-specific demand without long-term capital commitment
- Regional construction companies self-performing concrete placement on their own developments and infrastructure projects
It is less suited for operations requiring emissions-compliant engines in regulated jurisdictions, buyers needing immediate fleet standardization with late-model telematics, or contractors where operator recruitment depends on modern cab amenities including climate control.
Bottom Line
The 2004 Oshkosh S Series at $26,000 is a functional, documented, front-discharge mixer with a rebuild history and a mechanical engine that trades electronic complexity for serviceability. The 6.0/10 condition score and 38,265 hours demand realistic expectations — this truck will need attention, but it will also generate revenue immediately while newer equipment depreciates.
For buyers who measure value in yards delivered per dollar invested, this S Series warrants inspection.
37 images available. Maintenance records provided by seller. Proxy Equipment condition scoring based on visual inspection, operational testing, and seller disclosure verification.