2021 Peterbilt 579 Wheel Alignment Specifications
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick reference
| Angle | Front Pref | Front Range | Rear Pref | Rear Range |
|---|---|---|---|---|
| Camber | -0.25° | -0.5° to 0.0° | 0.0° | -0.25° to 0.25° |
| Caster | +3.0° | +2.5° to +3.5° | N/A | N/A |
| Total Toe | 0.06° | 0.0° to 0.12° | 0.0° | -0.05° to 0.05° |
| Individual Toe | 0.03° | 0.0° to 0.06° | 0.0° | -0.025° to 0.025° |
| SAI | +9.0° | +8.5° to +9.5° | N/A | N/A |
| Thrust Angle | N/A | N/A | 0.0° | -0.05° to 0.05° |
Adjustability
On the 2021 Peterbilt 579, only front toe is directly adjustable from the factory. Front camber and caster are built into the axle and steering knuckle geometry and are not adjustable without aftermarket parts. Rear alignment angles are also considered non-adjustable, set by the axle housing and suspension mounting.
Recommended adjustment hardware
To correct front camber or caster, eccentric bushings or shims can be installed at the kingpin. For significant camber issues, offset kingpins may be required. Caster is best adjusted using shims on the front axle.
Symptoms of bad alignment
- Feather wear: Caused by incorrect toe, where one side of a tire's tread blocks is sharper than the other.
- One-sided wear: A classic sign of camber issues, where the inside or outside edge of the tire wears down prematurely.
- Cupping or scalloping: Often a result of worn shocks or ball joints, but can be exacerbated by incorrect alignment.
- Pulling to one side: Can be caused by caster or camber being out of spec.
When to align
- After replacing tires.
- After any suspension or steering component replacement.
- After hitting a curb or large pothole.
- If you notice any of the tire wear patterns listed above.
Typical alignment cost
For a commercial truck like the Peterbilt 579, a three-axle alignment can cost between $250 and $500, depending on the shop and location.
Find a trusted alignment shop on Repairius.
More specs for the 2021 Peterbilt 579
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2021 Peterbilt 579 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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