2018 Ford F-350 Super Duty — Torque Specifications
Key torque specs for wheels, brakes, engine, axle, and transmission fasteners
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
| Fastener | Torque (ft-lb / Nm) | Notes |
|---|---|---|
| Wheel lug nuts (SRW/DRW) | 150–165 ft-lb / 203–224 Nm | Torque in a star/cross pattern; recheck after 50–100 miles. |
| Engine oil drain plug — 6.2L gas | 18–22 ft-lb / 24–30 Nm | New crush washer recommended. Do not overtighten the aluminum pan threads. |
| Engine oil drain plug — 6.7L Power Stroke | 20–28 ft-lb / 27–38 Nm | Verify if single or dual drain plugs; torque applies per plug. |
| Transmission drain plug — 6R140 | 18–22 ft-lb / 24–30 Nm | If servicing pan: pan bolts typically 80–100 in-lb (9–11 Nm). |
| Front brake caliper bracket (anchor) bolts | 150–170 ft-lb / 203–230 Nm | Varies by brake package/axle (SRW vs DRW). Use threadlocker if specified. |
| Rear brake caliper bracket bolts | 120–150 ft-lb / 163–203 Nm | Varies by axle/brake size. |
| Brake caliper slide guide pins (front/rear) | 25–30 ft-lb / 34–41 Nm | Clean and lube pins with high-temp silicone brake grease. |
| Front axle shaft/hub axle nut (4x4) | 240–350 ft-lb / 325–475 Nm | Depends on hub/bearing style. Some axles use a two-nut lock system; follow preload procedure. |
| Front hub locknut (two-nut systems) | 150–225 ft-lb / 203–305 Nm | After bearing preload and back-off per OEM sequence; install lock ring as equipped. |
| Rear full-float axle spindle nut (inner) | 35–50 ft-lb / 47–68 Nm, then back off | Preload while rotating wheel, then back off per spec before installing lock washer/nut. |
| Rear full-float axle locknut (outer) | 225–300 ft-lb / 305–407 Nm | Final torque after setting bearing end play. |
| Spark plugs — 6.2L gas | 11–15 ft-lb / 15–20 Nm | Torque for clean, dry threads; anti-seize not recommended on plated plugs. |
| Glow plugs — 6.7L diesel | 8–12 ft-lb / 11–16 Nm | Small-thread fasteners; use a torque wrench to avoid breakage. |
| Valve cover bolts — 6.2L/6.7L | 7–9 ft-lb / 9–12 Nm | Tighten in stages, center-out pattern. Do not overtighten. |
| Intake manifold bolts — 6.2L gas | 7–9 ft-lb / 9–12 Nm | Composite intake—follow crisscross sequence in stages. |
| Intake manifold/plenum bolts — 6.7L diesel | 15–22 ft-lb / 20–30 Nm | Includes intake manifold and upper plenum/Y-pipe connections as applicable. |
Wheel lug torque pattern
- Use a 10-lug star/cross pattern on DRW rear and an 8-lug star/cross on SRW axles. Always seat the wheel fully on clean, dry hubs and studs.
- Bring all lug nuts snug by hand, then torque in two to three passes to reach the final 150–165 ft-lb (203–224 Nm) range evenly.
- Recheck torque after the first 50–100 miles (80–160 km), especially on aluminum wheels.
Brake torque notes
- Caliper bracket (anchor) bolts: These high-torque fasteners vary with rotor size and axle package on the F-350. Expect roughly 150–170 ft-lb up front and 120–150 ft-lb in the rear. Replace any single-use bolts and apply the specified threadlocker when called for by Ford.
- Caliper slide pins: Clean the bores and use a quality silicone-based high-temp brake grease. Torque is typically 25–30 ft-lb. Sticking pins cause tapered pad wear and noise.
- Rotor retention/hub fasteners: If removed, follow the axle-specific hub nut or bearing preload procedures. Improper preload can cause brake pulsation and premature bearing failure.
Why torque matters
Correct fastener torque keeps clamping loads where Ford engineered them, which:
- Prevents wheel movement and stud fatigue that can lead to wheel-off events.
- Protects aluminum oil pans, valve covers, and plastic intake manifolds from cracking or warping.
- Ensures even brake pad wear and quiet operation while preventing bracket bolts from loosening under heavy-duty braking.
- Preserves wheel bearing life by setting the proper preload/end play on full-float and front hub assemblies.
- Avoids stripped threads and difficult repairs on small fasteners like spark/glow plugs.
Additional tips
- Use a calibrated torque wrench. For high-torque axle/hub nuts, a 3/4-inch drive torque wrench may be required.
- When a procedure calls for stages (preload, back-off, final torque), follow the OEM sequence exactly—especially on full-floating rear axles and any front hubs using two-nut systems.
- For spark plugs on the 6.2L gas V8, blow debris out of wells, install by hand to avoid cross-threading, and torque only on cold aluminum heads.
- Transmission service on the 6R140: If equipped with a drain plug, torque it to 18–22 ft-lb; pan bolts are typically 80–100 in-lb (9–11 Nm). Refill and verify fluid level per the temperature-based procedure.
Disclaimer: Ford used multiple axles, brake packages, and engines on the 2018 F-350 Super Duty. Always confirm critical fastener sizes and final torque values in the official Ford/OEM service information for your exact VIN, axle code, and brake package.
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More specs for the 2018 Ford F-350 Super Duty
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.
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.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
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
2014 F-350 Super Duty
2015 F-350 Super Duty
2016 F-350 Super Duty
2017 F-350 Super Duty
2019 F-350 Super Duty
2020 F-350 Super Duty
Maintenance & repair guides
2018 Ford F-350 Super Duty 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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