The 2008 Kenworth T800 is a highly respected vocational truck known for its durability and versatility. Produced from 1985 through 2010, the T800 chassis served as a foundation for numerous configurations, including conventional, set-forward axle, and set-back axle designs. While specific trims varied based on application, key options often centered around engine and drivetrain. Its popularity stems from its robust construction, driver-focused design, and adaptability to demanding tasks, making it a workhorse in construction, hauling, and specialized industries.
The Good
The 2008 Kenworth T800 offers exceptional reliability and powerful performance for demanding jobs. Its robust design ensures longevity, while the comfortable cabin caters to drivers on long hauls. This blend of practical durability and inherent value makes it a smart, trustworthy investment for any fleet or owner-operator.
The Bad
Potential weaknesses of a 2008 Kenworth T800 can include age-related wear on certain components like suspension bushings and exhaust systems. Electrical system issues or minor interior wear are also possibilities. Proactive maintenance and thorough pre-purchase inspections are crucial to mitigate these concerns.
2008 Kenworth T800: Quick Overview
- Engine Options: The 2008 Kenworth T800 was typically equipped with robust Cummins ISX, ISMe, and ISM engines, as well as PACCAR MX engines. These are known for their power and longevity in heavy-duty applications.
- Horsepower: Horsepower ratings generally ranged from approximately 350 hp to over 550 hp, depending on the specific engine model and configuration chosen by the original owner for their intended application.
- Fuel Economy: Fuel economy is highly variable and dependent on engine, transmission, axle ratio, load, terrain, and driving style. For a Class 8 truck like the T800, typical figures could range from 5-7 miles per gallon (MPG) in highway driving under optimal conditions.
- 0-60 Times: 0-60 mph times are not a primary metric for this class of vehicle. Performance is measured more by torque, acceleration under load, and ability to maintain speed on grades. When unladen, acceleration would be strong, but under full load, it would be significantly slower and focused on torque delivery.
- Towing Capacity: The towing capacity of a 2008 Kenworth T800 is extremely high and dictated by its Gross Vehicle Weight Rating (GVWR) and Gross Combined Weight Rating (GCWR), which can exceed 80,000 lbs and go much higher for specialized heavy haul configurations. It is designed to tow heavy trailers, including semi-trailers, tankers, and heavy equipment.
- Trim-Level Features: The T800 is a vocational truck, so "trims" are less about luxury packages and more about functional configurations. Key features include:
- Chassis Configurations: Available in standard conventional, set-forward axle (SFFA), and set-back axle (SBA) designs to optimize weight distribution and maneuverability for different applications.
- Cab Options: Day cabs (for local and regional routes) and various sleeper configurations (e.g., 38-inch, 60-inch, 72-inch) for over-the-road trucking.
- Suspension: A wide range of suspension options, including Kenworth's own proprietary systems (e.g., AG380, AG400, AG460) and aftermarket options, to suit load requirements and ride comfort.
- Axle and Drivetrain: Choice of single or tandem rear axles, various differentials, and transmission options (manual and automatic) from manufacturers like Eaton Fuller and Allison.
- Interior: While focused on utility, interiors offer durable materials, ergonomic controls, and optional amenities like air conditioning, power windows, and upgraded seating for driver comfort.
- Chassis Configurations: Available in standard conventional, set-forward axle (SFFA), and set-back axle (SBA) designs to optimize weight distribution and maneuverability for different applications.
2008 Kenworth T800 Specifications
Vehicle Information
| Year | 2008 |
| Make | Kenworth |
| Model | T800 |
| Trim | - |
| Style | - |
| Type | Truck |
| Category | Heavy Truck |
Manufacturing Details
| Made In | United States |
| Manufacturing City | MEXICALI |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 14.6L L6 DIESEL |
| Engine Size | 14.6L |
| Engine Cylinders | 6 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | 6x4 |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2008 Kenworth T800 Have?
The 2008 Kenworth T800, being a robust vocational truck, generally exhibits strong long-term reliability. However, as with any vehicle of this age and operational intensity, certain areas may require attention. Frequently reported concerns often revolve around typical wear and tear items rather than inherent design flaws. Common issues can include:
Exhaust System: Over time, exhaust components such as mufflers, DPF (Diesel Particulate Filter) systems if equipped, and associated piping can experience corrosion and leaks, especially in regions with harsh weather or road salt usage. Regular inspection and potential replacement are necessary.
Suspension Components: Bushings, airbags, and shock absorbers in the suspension system can wear out due to constant stress from heavy loads and varied road conditions. Symptoms might include a rougher ride, uneven tire wear, or clunking noises.
Cooling System: Radiators, hoses, and water pumps are critical. Leaks or failures in the cooling system can lead to overheating, which can cause severe engine damage. Regular checks for coolant levels and visible signs of leaks are essential.
Electrical System: While generally reliable, aging wiring harnesses, connectors, and alternators can develop issues. This might manifest as intermittent electrical problems, dimming lights, or starting difficulties. Ensuring connections are clean and secure is important.
Brake System: Wear on brake pads, rotors, and potential issues with air brake system components (valves, lines) are common maintenance items. Ensuring the braking system is in top condition is paramount for safety.
Recalls: Specific recalls for the 2008 model year would need to be checked against Kenworth's official recall database using the VIN. However, for heavy-duty trucks of this era, recalls often pertain to safety-critical systems like braking, steering, or potential fire hazards. It's crucial for any prospective buyer to verify if any outstanding recalls apply.
Long-Term Reliability: The T800 is built for longevity. With consistent and proper maintenance, including regular fluid changes, filter replacements, and addressing minor issues before they escalate, these trucks can serve for hundreds of thousands, if not millions, of miles. The core chassis and powertrain are designed for extreme durability. However, the specific reliability can also be influenced by the nature of its work; a truck used in constant stop-and-go construction will likely experience more wear on components than one used for long-haul highway transport.
Exhaust System: Over time, exhaust components such as mufflers, DPF (Diesel Particulate Filter) systems if equipped, and associated piping can experience corrosion and leaks, especially in regions with harsh weather or road salt usage. Regular inspection and potential replacement are necessary.
Suspension Components: Bushings, airbags, and shock absorbers in the suspension system can wear out due to constant stress from heavy loads and varied road conditions. Symptoms might include a rougher ride, uneven tire wear, or clunking noises.
Cooling System: Radiators, hoses, and water pumps are critical. Leaks or failures in the cooling system can lead to overheating, which can cause severe engine damage. Regular checks for coolant levels and visible signs of leaks are essential.
Electrical System: While generally reliable, aging wiring harnesses, connectors, and alternators can develop issues. This might manifest as intermittent electrical problems, dimming lights, or starting difficulties. Ensuring connections are clean and secure is important.
Brake System: Wear on brake pads, rotors, and potential issues with air brake system components (valves, lines) are common maintenance items. Ensuring the braking system is in top condition is paramount for safety.
Recalls: Specific recalls for the 2008 model year would need to be checked against Kenworth's official recall database using the VIN. However, for heavy-duty trucks of this era, recalls often pertain to safety-critical systems like braking, steering, or potential fire hazards. It's crucial for any prospective buyer to verify if any outstanding recalls apply.
Long-Term Reliability: The T800 is built for longevity. With consistent and proper maintenance, including regular fluid changes, filter replacements, and addressing minor issues before they escalate, these trucks can serve for hundreds of thousands, if not millions, of miles. The core chassis and powertrain are designed for extreme durability. However, the specific reliability can also be influenced by the nature of its work; a truck used in constant stop-and-go construction will likely experience more wear on components than one used for long-haul highway transport.
How long will the 2008 Kenworth T800 last?
Estimating average mileage for a 2008 Kenworth T800 is challenging due to its vocational nature, but many can easily surpass 500,000 to over 1,000,000 miles with diligent maintenance. Owner data suggests that trucks used for long-haul operations, with regular oil changes, fluid checks, and proactive repairs, exhibit exceptional long-term durability. Weaknesses that emerge over time typically relate to the wear and tear on components like suspension bushings, exhaust systems, and possibly aging electrical connectors. However, the core powertrain and chassis are engineered for extreme longevity, making the T800 a sound investment for those committed to upkeep. Its robust construction is a testament to its ability to withstand decades of heavy use.
What Technology & Safety Features are Included?
The 2008 Kenworth T800, as a vocational heavy-duty truck, prioritizes functionality and durability over cutting-edge integrated technology. Built for work, its features are geared towards operator efficiency and safety in demanding environments.
Built-in Tech & Entertainment: Standard tech was typically functional rather than advanced. This included a robust AM/FM radio, often with a CD player. Optional upgrades might have included CB radios for communication and more sophisticated infotainment systems for longer hauls, though these were less common than in modern consumer vehicles. The focus was on reliable operation and clear diagnostics for the driver. The dashboard typically featured a comprehensive array of gauges for engine monitoring, air pressure, and other critical systems, providing drivers with essential real-time information.
Driver-Assistance Features: Driver-assistance features were minimal in 2008 for this class of truck, especially compared to today's standards. Features like cruise control were common, aiding driver comfort on long stretches. Advanced systems such as lane departure warnings, adaptive cruise control, or automatic emergency braking were not standard and rarely available even as options. The primary "assistance" came from the truck's robust engineering, visibility, and the driver's skill.
Safety Features: Safety in the 2008 T800 is primarily inherent in its robust construction. Features included:
Crash-Test Ratings: Heavy-duty commercial trucks like the Kenworth T800 are not subjected to the same consumer-focused crash-test ratings (like NHTSA or IIHS) as passenger cars and light trucks. Their structural integrity is designed to meet stringent federal motor vehicle safety standards (FMVSS) for commercial vehicles, which focus on durability, occupant protection in severe impacts, and resistance to rollover under heavy load conditions. Therefore, direct crash-test score comparisons are not applicable.
Built-in Tech & Entertainment: Standard tech was typically functional rather than advanced. This included a robust AM/FM radio, often with a CD player. Optional upgrades might have included CB radios for communication and more sophisticated infotainment systems for longer hauls, though these were less common than in modern consumer vehicles. The focus was on reliable operation and clear diagnostics for the driver. The dashboard typically featured a comprehensive array of gauges for engine monitoring, air pressure, and other critical systems, providing drivers with essential real-time information.
Driver-Assistance Features: Driver-assistance features were minimal in 2008 for this class of truck, especially compared to today's standards. Features like cruise control were common, aiding driver comfort on long stretches. Advanced systems such as lane departure warnings, adaptive cruise control, or automatic emergency braking were not standard and rarely available even as options. The primary "assistance" came from the truck's robust engineering, visibility, and the driver's skill.
Safety Features: Safety in the 2008 T800 is primarily inherent in its robust construction. Features included:
- Heavy-Duty Frame and Cab: The T800 is built with a reinforced frame and a strong cab designed to protect occupants in the event of a collision.
- Air Brakes: Standard air brake systems provide powerful and reliable stopping capabilities.
- Lighting: Comprehensive exterior lighting (headlights, turn signals, marker lights) ensures visibility.
- Seatbelts: Standard three-point seatbelts are crucial safety restraints.
- Optional Safety Equipment: Depending on the specific configuration and customer specifications, optional safety features might have included enhanced mirrors for better visibility, fog lights, and sometimes ABS (Anti-lock Braking System), though ABS was becoming more standard around this period.
Crash-Test Ratings: Heavy-duty commercial trucks like the Kenworth T800 are not subjected to the same consumer-focused crash-test ratings (like NHTSA or IIHS) as passenger cars and light trucks. Their structural integrity is designed to meet stringent federal motor vehicle safety standards (FMVSS) for commercial vehicles, which focus on durability, occupant protection in severe impacts, and resistance to rollover under heavy load conditions. Therefore, direct crash-test score comparisons are not applicable.
What Colors Options are Available?
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2008 Kenworth T800 Prices and Market Value
When new, the 2008 Kenworth T800 had a substantial price tag, typically ranging from $100,000 to $180,000+ depending on engine, chassis configuration, and added options. Resale values for these trucks remain relatively strong due to their legendary durability and demand in the vocational sector. Current used market prices for a 2008 Kenworth T800 can vary significantly, generally falling between $30,000 and $70,000, sometimes more for exceptionally well-maintained or specialized configurations. Depreciation is less steep compared to consumer vehicles because their robust build and operational longevity are highly valued. Factors affecting resale include mileage, overall condition, maintenance history, tire wear, engine hours, and specific vocational upfitting (e.g., dump body, crane).
2008 Kenworth T800 Cost of Ownership
Owning a 2008 Kenworth T800 involves significant costs. Insurance premiums will be higher than for light-duty vehicles, reflecting its value and commercial use. Fuel costs are substantial, averaging 5-7 MPG depending on operation. Maintenance and repair costs are considerable, though its durability often offsets this. Routine maintenance like oil changes and filter replacements are standard, but major repairs to the powerful engines or drivetrain can be expensive. Overall, it's a costly vehicle to own and operate, but its economic viability comes from its immense productivity and long service life when properly maintained, making it cost-effective for businesses focused on hauling and demanding tasks.
2008 Kenworth T800 Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2008 Kenworth T800 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2008 Kenworth T800 Insurance
Insurance for a 2008 Kenworth T800 is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2008 Kenworth T800 Compare to Other Truck?
The 2008 Kenworth T800 competes in the highly demanding vocational and heavy-haul truck market. Key rivals from that era include:
Peterbilt 387/389: Similar in construction and reputation for durability, Peterbilts often offer a slightly more premium interior feel and a comparable range of powertrain options. Performance and reliability are generally on par with the Kenworth T800. Price-wise, they would have been in a similar new ballpark and maintain strong used values.
International ProStar/9900i: International trucks from this period offered robust performance and a wide array of configurations. The ProStar was more focused on highway efficiency, while the 9900i series was a more traditional conventional truck. Reliability can be comparable, though some operators might perceive Kenworth and Peterbilt as having a slight edge in long-term build quality and driver comfort.
Freightliner Columbia/Cascadia: Freightliner trucks are known for their focus on fuel efficiency and often offer a more aerodynamic design (especially the Cascadia). Performance is competitive, and reliability is generally good, though some users might find the T800's construction more rugged for extreme vocational duty. Pricing could be slightly more competitive, particularly for the Columbia.
Volvo VNL Series: Volvo trucks often emphasize driver comfort and advanced technology. Performance and reliability are strong contenders. In 2008, the VNL series would have been competing in a similar space, offering excellent ride quality and fuel efficiency, but perhaps less focus on the sheer brute force vocational applications that the T800 excels at.
Recommendation:
If performance, extreme durability, and vocational versatility are paramount, the 2008 Kenworth T800 remains an excellent choice. Its set-forward or set-back axle options offer unique advantages for specific applications. For similar ruggedness and reliability, a Peterbilt 389 is a very close alternative. If fuel efficiency for highway operations is a higher priority, a Freightliner Cascadia or Volvo VNL might be considered, though they might not be as specialized for heavy vocational work. The T800's popularity is a testament to its balanced offering of power, endurance, and driver-centric design for its intended purpose.
Peterbilt 387/389: Similar in construction and reputation for durability, Peterbilts often offer a slightly more premium interior feel and a comparable range of powertrain options. Performance and reliability are generally on par with the Kenworth T800. Price-wise, they would have been in a similar new ballpark and maintain strong used values.
International ProStar/9900i: International trucks from this period offered robust performance and a wide array of configurations. The ProStar was more focused on highway efficiency, while the 9900i series was a more traditional conventional truck. Reliability can be comparable, though some operators might perceive Kenworth and Peterbilt as having a slight edge in long-term build quality and driver comfort.
Freightliner Columbia/Cascadia: Freightliner trucks are known for their focus on fuel efficiency and often offer a more aerodynamic design (especially the Cascadia). Performance is competitive, and reliability is generally good, though some users might find the T800's construction more rugged for extreme vocational duty. Pricing could be slightly more competitive, particularly for the Columbia.
Volvo VNL Series: Volvo trucks often emphasize driver comfort and advanced technology. Performance and reliability are strong contenders. In 2008, the VNL series would have been competing in a similar space, offering excellent ride quality and fuel efficiency, but perhaps less focus on the sheer brute force vocational applications that the T800 excels at.
Recommendation:
If performance, extreme durability, and vocational versatility are paramount, the 2008 Kenworth T800 remains an excellent choice. Its set-forward or set-back axle options offer unique advantages for specific applications. For similar ruggedness and reliability, a Peterbilt 389 is a very close alternative. If fuel efficiency for highway operations is a higher priority, a Freightliner Cascadia or Volvo VNL might be considered, though they might not be as specialized for heavy vocational work. The T800's popularity is a testament to its balanced offering of power, endurance, and driver-centric design for its intended purpose.
Final Verdict: Is the 2008 Kenworth T800 a Good Truck?
The 2008 Kenworth T800 is ideal for owner-operators and fleet managers seeking a highly durable, reliable, and versatile heavy-duty truck for demanding vocational applications such as construction, logging, or specialized hauling. It's absolutely worth buying if longevity and robust performance are prioritized over cutting-edge technology or luxury. Buying used is the only option, and it's crucial to inspect thoroughly, especially for mileage, engine hours, and maintenance records. Specific trims or configurations (like set-forward axle for tight turns or heavy-duty suspension) should align precisely with the intended work. With proper maintenance, a 2008 T800 can provide many more years of productive service, making it a sound, albeit substantial, investment.
Eugene S
Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.