2016 Freightliner M2 106 Wheel Alignment Specifications

Quick reference

Adjustability

On the 2016 Freightliner M2 106, front axle camber and caster are typically adjusted using eccentric bushings or shims, depending on the specific suspension configuration. Total toe is adjustable via the tie rod ends. Individual toe is a result of total toe and thrust angle and is not directly adjusted. SAI (Steering Axis Inclination) is a non-adjustable "helper angle" primarily determined by the steering knuckle and suspension design; it changes if there is collision damage or component wear. It is important to note that many heavy-duty trucks like the M2 106 have a straight drive axle, meaning rear camber, caster, and individual toe are generally non-adjustable from the factory. Rear total toe and thrust angle can be adjusted on some models using shims between the axle and leaf springs or by adjusting control arms on air-ride suspensions, if equipped. Always consult the vehicle-specific service manual for the exact adjustment procedures and hardware.

Recommended adjustment hardware

For the 2016 Freightliner M2 106, several methods are used for alignment adjustments. Front camber and caster adjustments often involve eccentric bushings either in the spring pins or in the axle kingpin. Some heavy-duty trucks may use shims placed behind the kingpin bushings or at the leaf spring mounts to achieve the desired camber and caster settings. For front toe, standard threaded tie rod ends allow for precise adjustments. If your M2 106 has a multi-leaf front spring suspension, special tools may be required for adjusting shims or eccentric bushings. For rear axle alignment on models with air suspension or adjustable control arms, specialized adjustable links or shims may be used to correct total toe and thrust angle. Always ensure that any aftermarket parts used for alignment adjustments are reputable and designed for heavy-duty truck applications to maintain durability and safety.

Symptoms of bad alignment

Misalignment on a 2016 Freightliner M2 106 can manifest in several ways, primarily through uneven tire wear, handling issues, and reduced fuel efficiency. Here's what to look for:

• Feathering: This occurs when one side of the tire tread block is worn smooth while the other side is sharp. It's typically caused by excessive toe-in or toe-out.
• Camber Wear (one-sided wear): If the tires are excessively worn on either the inside or outside edge, it often indicates an issue with camber. Positive camber causes outer edge wear, while negative camber causes inner edge wear.
• Cupping or Scalloping: Uneven dips and valleys on the tire tread can point to worn or damaged suspension components, but can also be exacerbated by poor alignment, especially if related to dynamic caster or camber issues.
• Dog Tracking: The truck appears to be driving at an angle, with the rear wheels not following directly behind the front wheels. This is a classic symptom of an incorrect thrust angle.
• Steering Wheel Off-Center: If the steering wheel is not straight when the vehicle is traveling straight on a level road, it's a strong indicator of toe or thrust angle issues.
• Vehicle Pulling: The truck consistently drifts to one side, requiring constant steering correction. This can be caused by incorrect caster, camber, or a significant thrust angle issue.

When to align

Wheel alignment is not a "set it and forget it" service for heavy-duty trucks like the M2 106. Regular checks and alignments are crucial for safety, tire life, and fuel economy. Consider an alignment in these situations:

• After any suspension or steering component replacement: This includes kingpins, tie rods, drag links, leaf springs, control arms, or axle repairs.
• After a collision or hitting a large pothole/curb: Impacts can easily knock alignment angles out of specification.
• When replacing tires: New tires are a significant investment, and proper alignment will ensure you get the maximum lifespan out of them.
• During routine maintenance or at least annually: Preventative alignments can catch minor issues before they become major problems.
• If you notice any of the "Symptoms of bad alignment" listed above.
• After making significant changes to vehicle load distribution or towing frequently: While not always directly impacting static alignment numbers, load changes can affect dynamic alignment and suspension wear.

Typical alignment cost

The cost of a wheel alignment for a 2016 Freightliner M2 106 can vary significantly based on location, shop rates, and the complexity of the adjustments required. For a heavy-duty truck, you can generally expect to pay anywhere from $150 to $400 for a two-axle alignment. If additional parts or repairs are needed to bring the vehicle into specification (e.g., worn kingpins, tie rod ends, or custom shims), the total cost will be higher. Always ask for a detailed estimate before any work begins.

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