2024 Kenworth T680 Wheel Alignment Specifications

Quick reference

Adjustability

On the 2024 Kenworth T680, front axle camber and caster are typically adjusted using eccentric bushings or shims, depending on the specific suspension configuration. Many heavy-duty trucks utilize a solid front axle, where major camber adjustments might require axle correction (bending) if outside the normal range of shim or bushing adjustment. Front individual toe is adjustable via tie rod adjustments. Heavy-duty truck rear axles often have less direct adjustability compared to passenger vehicles. Rear toe and camber are primarily set during manufacturing, with minor adjustments sometimes possible through shims or eccentric bushings at the spring mounts or axle housing on certain suspension designs. However, significant rear axle alignment issues generally point to bent components or worn suspension parts.

Recommended adjustment hardware

For most front axle adjustments, OEM or equivalent eccentric bushings and shims are the primary components for correcting camber and caster. Ensure that any replacement or adjustment hardware meets Kenworth's specifications to maintain proper handling and durability. While aftermarket cam bolts are common for light-duty trucks, heavy-duty applications like the T680 typically rely on robust shims, eccentric kingpin bushings, or specialized repair kits designed for heavy-duty front axles.

Symptoms of bad alignment

Misalignment on a heavy-duty truck like the Kenworth T680 can lead to several noticeable issues:

• Uneven Tire Wear: This is the most common and costly symptom. \n * Feathering: Saw-tooth like wear on one side of a tire tread block, often indicating excessive toe. \n * Cupping/Scalloping: Depressions or dips around the tire's circumference, which can be caused by worn suspension components or an imbalanced tire, but also aggravated by misalignment. \n * Shoulder Wear: Excessive wear on either the inner or outer edge of the tire, often indicative of too much negative or positive camber, respectively. Also, improper toe can cause shoulder wear.
• Steering Wheel Off-Center: If your steering wheel is not straight when driving in a straight line, it's a strong indicator of toe issues or a thrust angle problem.
• Vehicle Pulling: The truck drifts or pulls to one side, requiring constant steering correction to stay straight. This can be caused by camber, caster, or thrust angle issues.
• Loose or Wandering Steering: The truck feels "floaty" or difficult to keep in a straight line, often linked to insufficient caster or excessive toe-in.
• Increased Fuel Consumption: Misaligned wheels create more rolling resistance, leading to reduced fuel efficiency.

When to align

• After any suspension or steering component replacement: This includes kingpins, tie rod ends, control arms, springs, bushings, and axle repairs.
• After a significant impact: Hitting a large pothole, curb, or being involved in a minor accident can knock alignment out of specification.
• When installing new tires: To protect your investment and ensure maximum tire life.
• If you notice any of the symptoms of bad alignment.
• During routine maintenance: Many fleet maintenance schedules recommend annual or bi-annual alignments for heavy-duty trucks, or every 50,000 to 100,000 miles, depending on application.

Typical alignment cost

The cost of a wheel alignment for a heavy-duty truck like the Kenworth T680 can vary significantly based on location, shop rates, and the complexity of adjustments needed. Generally, you can expect to pay anywhere from $150 to $400 or more for a comprehensive 3-axle or 2-axle alignment. This price typically includes the inspection and adjustment of front and rear axles where applicable. If specialized adjustments like kingpin bushing replacement or axle correction are required, the cost will be substantially higher.

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