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1998 Kenworth T800 Overview, Reviews, Ratings & Specs

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Eugene S | October 15, 2025
The 1998 Kenworth T800 is a Class 8 heavy-duty truck renowned for its robust construction and versatility. Primarily a vocational and line-haul truck, it has been in continuous production with various updates since the 1980s. Key trims often reflect its configuration, such as the T800B for heavy-duty applications. Its popularity stems from its exceptional durability, driver comfort for its era, and the ability to be configured for numerous demanding tasks. Pricing when new varied significantly based on specifications, ranging from approximately $80,000 to well over $150,000.
The Good

The 1998 Kenworth T800 offers legendary reliability and robust performance, capable of tackling tough jobs. Its comfortable cab design appeals to drivers on long hauls, while its proven durability and strong resale value make it a smart, practical investment.

The Bad

Potential weaknesses for a 1998 Kenworth T800 include aging electrical components, potential for corrosion on older frames and body panels, and the need for thorough inspection of the powertrain and suspension due to its age and typical heavy-duty use.

1998 Kenworth T800: Quick Overview

  • Engine Options: The 1998 Kenworth T800 was typically equipped with a range of Cummins and Caterpillar diesel engines. Common options included the Cummins ISM, Cummins ISX (later models), and Caterpillar C10/C12. Ford-Triton engines were also available in some configurations, though less common in heavy-duty vocational builds.
  • Horsepower: Horsepower ratings varied significantly based on the specific engine model and configuration. Typically, these engines ranged from approximately 330 horsepower for smaller displacement units up to 550 horsepower or more for high-performance and heavy-haul applications.
  • Fuel Economy: Fuel economy for a Class 8 truck of this era is highly dependent on the engine, transmission, gearing, load, and driving conditions. Owners typically reported figures in the range of 5 to 7 miles per gallon (MPG) for highway driving, and often lower in vocational or off-road use.
  • 0-60 Times: 0-60 mph times are generally not a standard metric for heavy-duty trucks, as their purpose is not rapid acceleration. Performance is measured in torque and ability to pull.
  • Towing Capacity: The towing capacity is immense and dependent on the specific configuration, chassis, axle ratings, and fifth wheel rating. The T800 is designed for heavy hauling, with Gross Combination Weight Ratings (GCWR) often exceeding 80,000 pounds and capable of much higher in specialized configurations.
  • Trim-Level Features: While the T800 doesn't have traditional "trims" like passenger cars, its features are defined by its configuration. Standard features would include a durable chassis, powerful diesel engine, robust transmission (manual or automatic), hydraulic power steering, and a functional driver's cabin. Optional features commonly found include air-ride suspension, upgraded interior amenities for driver comfort (e.g., air conditioning, power windows, premium seating), various exhaust configurations, specialized PTO systems for vocational use, and different axle ratios to suit specific hauling needs. Exterior options could include chrome accents, different grille styles, and specialized lighting.

1998 Kenworth T800 Specifications

Vehicle Information
Year 1998
Make Kenworth
Model T800
Trim -
Style -
Type Truck
Category Heavy Truck
Manufacturing Details
Made In Mexico
Manufacturing City RENTON
Dimensions
Doors -
Curb Weight -
Gross Vehicle Weight Rating 330001 pounds
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating -
Engine & Performance
Engine 12.7L I6
Engine Size 12.7L
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 1998 Kenworth T800 Have?

Given the 1998 model year, the 1998 Kenworth T800, like any vehicle of this age, can experience various issues. One of the most common areas of concern for trucks of this vintage relates to aging electrical systems. Wiring harnesses can become brittle, connectors can corrode, leading to intermittent issues with lights, gauges, and other electronic components. The cooling system, including radiators, hoses, and water pumps, may also require attention as rubber components degrade over time and metal parts can corrode. Fuel system components, such as injectors and fuel pumps, are subject to wear and can become problematic. The transmission and clutch, especially in manual transmission models, will show wear depending on the operational history; clutch wear is a frequent item. Air brake systems, critical for safety, require regular inspection and maintenance, with potential for leaks in air lines or issues with the compressor or valves. While specific recalls for the 1998 model year are not widely publicized in general automotive databases, it's crucial for any prospective owner to verify the VIN against any outstanding manufacturer recalls or service bulletins. Long-term reliability is highly dependent on the rigorous maintenance schedule followed throughout its life. Trucks that have been regularly serviced with quality parts and addressed minor issues promptly tend to have better long-term durability. Conversely, those used in extremely demanding applications or neglected will likely exhibit more significant wear and tear. Engine-specific issues can arise, particularly with older Cummins or Caterpillar engines, often related to wear on internal components or accessory failures. Transmission issues, whether manual or automatic, are also a point of potential concern as these are complex and heavily utilized components.

How long will the 1998 Kenworth T800 last?

A well-maintained 1998 Kenworth T800, especially if used for line-haul operations, can realistically achieve 1 million miles or more before requiring a major engine or transmission overhaul. Vocational trucks, which often experience more idle time and stop-and-go driving, might see slightly lower mileage accumulation but still demonstrate significant longevity. The T800 is celebrated for its robust frame and suspension, contributing to its long-term durability. Weaknesses that manifest over time often relate to the components that are subject to wear and tear: the engine, transmission, clutch, and various auxiliary systems. Electrical components and cooling system parts are also prone to age-related issues. However, the core structure of the Kenworth T800 is built to last, meaning that with consistent maintenance and proactive repair, these trucks can remain in service for decades.

What Technology & Safety Features are Included?

The 1998 Kenworth T800, being a heavy-duty truck from that era, prioritizes functionality and durability over advanced technological integration common in modern vehicles. Built-in technology was relatively rudimentary. The standard dashboard would typically feature essential analog gauges for engine RPM, speed, oil pressure, coolant temperature, and fuel level. Entertainment systems were usually basic AM/FM radios, sometimes with a cassette player. Options might have included a CB radio for long-haul communication. Driver-assistance features were virtually non-existent by today's standards. Cruise control was a common, though not always standard, option. Advanced safety features like ABS (Anti-lock Braking System) were becoming more prevalent and were often an option or standard depending on the specific configuration and intended use. Air brakes were the primary braking system, and their effectiveness was a key safety component. The cabin itself was designed for driver visibility, with large windows and a commanding seating position. The robust construction of the T800 inherently contributed to occupant safety in the event of a collision, though formal crash-test ratings in the same vein as passenger cars were not typically conducted or publicly available for commercial trucks of this class and era. Optional safety features could include enhanced lighting packages for better visibility at night or in adverse weather conditions. Seatbelts were standard. The focus for driver comfort, which indirectly aids safety by reducing fatigue, included features like adjustable steering columns, air-ride seats, and robust climate control systems (heating and air conditioning), which were often optional upgrades.

What Colors Options are Available?

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1998 Kenworth T800 Prices and Market Value

When new, the 1998 Kenworth T800 had a broad price range, typically starting around $80,000 for a basic configuration and extending to well over $150,000 for highly specialized or premium builds. As a used vehicle, prices in 2023/2024 can vary dramatically, from $15,000 to $50,000 or more, heavily dependent on mileage, condition, engine, transmission, and specific vocational application. Depreciation is significant, especially in the first decade, but the T800's reputation for durability means it holds value better than many competitors. Factors affecting resale value include maintenance history, engine hours, overall cosmetic condition, tire wear, and whether it has been used in harsh environments. Trucks with well-documented maintenance and in good working order will command the highest prices.

1998 Kenworth T800 Cost of Ownership

Owning a 1998 Kenworth T800 can be costly, but its value lies in its capability. Insurance premiums are substantial, reflecting the vehicle's value and risk. Fuel costs are a major ongoing expense, with MPG typically ranging from 5-7. Maintenance is critical; regular oil changes, filter replacements, and proactive repairs are essential and can be costly, especially for specialized components. Repair costs can be high due to the complexity and size of parts. While not economical in terms of fuel consumption or day-to-day running costs, its long-term durability and strong resale value can offset some of the initial investment, making it a cost-effective choice for businesses that require its robust performance.

1998 Kenworth T800 Fuel Efficiency

Fuel Type Diesel
Fuel Capacity -
City Mileage -
Highway Mileage -

1998 Kenworth T800 Recalls & Defects

Electrical System:wiring:front Underhood
Recall date 1998-06-11
Recall no. 98v129000
Source NHTSA
Summary Vehicle Description: Heavy Duty Trucks Equipped With Caterpillar 3406e Engines. THE Routing OF THE Electrical and Fuel Lines CAN Cause Chaffing OF THE Wiring Harness ON THE Fuel Line.
Consequence This Chaffing CAN Cause Fuel Leakage and A Potential FOR A Fire IN THE Engine Compartment.
Remedy Dealers Will Inspect, Adjust, and Repair, IF Necessary, THE Fuel Line and Electrical Harness.
Notes Owner Notification IS Expected TO Begin During July 1998.owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Kenworth AT 1-206-828-5418.also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-dash-2-dot (1-888-327-4236).
Electrical System:ignition:module
Recall date 1999-07-09
Recall no. 99v181001
Source NHTSA
Summary Vehicle Description: Heavy Duty Trucks Equipped With Caterpillar Engines and Eaton Autoshift Transmissions. THE Engines CAN Stall Because OF Software Problems.
Consequence Increased Steering Effort CAN Occur.
Remedy Dealers Will Update These Engines With Software Changes. Caterpillar IS Conducting THE Owner Notification and Remedy OF This Recall.
Notes Owner Notification IS Expected TO Begin During August 1999.owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Kenworth AT 1-206-828-5418 or Peterbilt AT 1-940-591-4000.also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-dash-2-dot (1-888-327-4236).
Suspension:front:control Arm:lower ARM
Recall date 2001-02-20
Recall no. 01v051000
Source NHTSA
Summary Vehicle Description: Vehicles Equipped With 54" Rear Axle Spacing Configuration OF THE Airglide 200 Suspension With THE Service Application Identified AS Logger, Dump Truck, or Tanker. THE Rear Suspension IS Regularly Subjected TO Extreme Articulation, Resulting IN Flexing OF THE Joint.
Consequence Failure OF THE Lower Sway ARM Attaching Bolts Could Result IN Loss OF Vehicle Control.
Remedy Dealers Will Replace THE Lower Sway ARM Brackets. Owner Notification Began March 27, 2001. Owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Kenworth AT 1-425-828-5000.
Notes Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Equipment:other:labels
Recall date 2001-04-24
Recall no. 01v142000
Source NHTSA
Summary Vehicle Description: Heavy Duty Trucks Equipped With Meritor Fg941 Steer Axles. THE Gross Axle Weight Rating (Gawr) WAS Determined Incorrectly and Over-Stated ON THE Vehicle Certification Label. With THE Incorrect Gawr Listed, These Labels DO NOT Meet THE Certification Requirements OF Part 567, "requirements FOR Manufacturers OF Motor Vehicles." Vehicles Will BE Remedied Either BY Assigning THE Proper Weight Rating OR, IF Possible, BY Changing THE Necessary Components TO Meet THE Currently Assigned Weight Rating.
Consequence These Vehicles Would NOT BE IN Compliance With Federal Regulations.
Remedy Vehicles Will BE Remedied Either BY Assigning THE Proper Weight Rating OR, IF Possible, BY Changing THE Necessary Components TO Meet THE Currently Assigned Weight Rating. Owner Notification Began June 22, 2001. Owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Kenworth AT 1-425-828-5000.
Notes Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Suspension:rear
Recall date 2002-02-27
Recall no. 02v061001
Source NHTSA
Summary ON Certain Heavy Duty Trucks Equipped With Replacement Dana Spicer Tandem Drive Axle Models Ds463 and Ds521, Installed ON Vehicles From MAY 1, 2001 Through February 1, 2002, AN Undersized Attachment Weld MAY Fracture Without Warning.
Consequence THE Loss OF This Attachment TO THE Vehicle Chassis CAN Adversely Affect Vehicle Handling or Driver Control.
Remedy Dana IS Conducting THE Owner Notification and Remedy FOR This Campaign. THE Dealers Will Remove THE Suspect Bracket, Inspect THE Axle Housing, and Reweld THE Bracket TO THE Axle Housing. Owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Dana AT 616-567-1088 or Kenworth AT 425-828-5440.
Notes Consumers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-327-4236.
Service Brakes, AIR
Recall date 2003-03-31
Recall no. 03v126000
Source NHTSA
Summary Certain Trucks Equipped With Meritor P 18x7 Brakes With 36" Brake Chambers Fail TO Comply With THE Requirements OF Federal Motor Vehicle Safety Standard (Fmvss) NO. 121, "air Brake Systems." These Trucks Were Manufactured With A Combined AIR Reservoir Volume Less Than 12 Times THE Combined Volume OF All Service Brake Chambers.
Consequence This Does NOT Meet THE Requirements OF THE Standard.
Remedy Dealers Will ADD AN Additional Tank or Change ONE OF THE Existing AIR Tanks TO A Larger Size. Owner Notification Began ON MAY 5, 2003. Owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy Within A Reasonable Time Should Contact Kenworth AT 1-425-828-5440.
Notes Kenworth Recall NO. 03kw3. Customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Vehicle Speed Control
Recall date 2003-07-09
Recall no. 03v245000
Source NHTSA
Summary ON Certain Vehicles Equipped With Cummins Electronic Control Modules ON THE C8.3g and L10g Engines, THE ECM Does NOT Have THE Ability TO Detect A Throttle Fail-Safe Engine Shutdown Command. This Could Result IN AN Unanticipated, Uncommanded Open Throttle Condition Without Warning.
Consequence IF This Event Occurs, THE Vehicle Operator Will NOT Have Control OF THE Engine Speed, Possibly Resulting IN A Vehicle Crash.
Remedy Cummins Will Notify THE Customers and Replace THE Ecm. Owners Should Contact Cummins AT 1-800-343-7357 or Kenworth AT 1-425-828-5440.
Notes Customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Suspension:front:hub
Recall date 2003-04-01
Recall no. 03v125000
Source NHTSA
Summary ON Certain Trucks Equipped With Truck HUB Units Manufactured BY SKF Exclusively FOR USE ON Arvinmeritor's Ff98x Series Non-Drive Steer Axles, THE HUB Unit Bearings CAN Wear Prematurely.
Consequence Seizure OF THE Bearings CAN Cause Wheel Separation or Wheel END Fire.
Remedy Dealers Will Replace All Front Axle Hubs. Notification Began July 16, 2003. THE Manufacturer HAS Advised US That Parts Will NOT BE Available Until September 2003. Owners WHO Take Their Vehicles TO AN Authorized Dealer ON AN Agreed Upon Service Date and DO NOT Receive THE Free Remedy With A Reasonable Time Should Contact Peterbilt AT 940-591-4201 or Kenworth 425-828-5440.
Notes Kenworth Recall NO. 03kw2 and Peterbilt Recall NO. 303-A.customers CAN Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-dash-2-dot (1-888-327-4236).

1998 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

1998 Kenworth T800 Insurance

Insurance for a 1998 Kenworth T800 is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.

How Does the 1998 Kenworth T800 Compare to Other Truck?

The 1998 Kenworth T800 competed in the heavy-duty vocational and line-haul truck market against strong rivals like the Peterbilt 379, Freightliner FLD/Columbia, and International 9000 series. In terms of performance, the T800 was renowned for its powerful engine options (Cummins, Caterpillar) and robust drivetrain, offering excellent pulling power comparable to the Peterbilt 379, which was often its closest competitor in terms of prestige and build quality. Freightliner FLD/Columbia models often offered a slightly more contemporary design and potentially a wider range of electronic options for their time, though sometimes at the expense of the traditional ruggedness associated with Kenworth and Peterbilt. International trucks provided a solid alternative, often focusing on value and a broad range of configurations.

Regarding features, the T800 of this era was more focused on function than luxury, with a durable interior designed for long hours. While competitors might have offered slightly more creature comforts or optional electronic aids, the Kenworth's cabin was known for its driver-centric layout and visibility. Reliability is where the Kenworth T800 truly shone. Its legendary durability and heavy-duty construction often surpassed that of its rivals, especially Freightliner, which in the late 90s, was still evolving its long-haul offerings. The T800 was built to withstand demanding conditions and accumulated significant mileage with proper maintenance.

Price-wise, Kenworths and Peterbilts typically commanded a premium both when new and on the used market compared to Freightliner or International, reflecting their perceived superior build quality and longevity.

Alternatives:
  • Similar: Peterbilt 379: Offers a very comparable experience in terms of build quality, durability, and performance. Often considered a direct competitor with similar strengths and a slightly different aesthetic.
  • Similar: Western Star 4900: Another heavy-duty vocational truck known for its robustness and capability, particularly in severe service applications.
  • Slightly Different: Freightliner FLD/Columbia: While also capable, these might offer a slightly more modern feel for the era, but potentially with a different long-term durability profile compared to the T800.

For buyers prioritizing unmatched durability and a proven workhorse for tough jobs, the 1998 Kenworth T800 remains an excellent choice. If a slightly more modern interior or potentially lower initial used price is a priority, a Freightliner Columbia could be considered, but sacrifices might be made in terms of overall ruggedness. The Peterbilt 379 is the most direct alternative offering a very similar core proposition.

Final Verdict: Is the 1998 Kenworth T800 a Good Truck?

The 1998 Kenworth T800 is ideal for owner-operators, small to medium-sized fleets, and businesses requiring a highly durable, versatile, and capable heavy-duty truck for vocational applications (like construction, refuse, or specialized hauling) or long-haul trucking. It is absolutely worth buying if you prioritize longevity, reliability, and a truck that can withstand demanding use. Given its age, purchasing this truck is exclusively a used market decision. It's crucial to buy one that has been meticulously maintained, preferably with documented service records. Avoid units that have been severely neglected or used in extremely harsh conditions without proper care. Any T800 from this era will require ongoing maintenance, so a commitment to upkeep is essential for maximizing its lifespan and value.

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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.