2020 International LT Transmission Fluid & Service
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.
Working on this 2020 International LT? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
Quick answer
The 2020 International LT can be equipped with a variety of transmissions, including Eaton Fuller manual and automated manual transmissions (AMTs), and Allison automatic transmissions. Due to the wide range of configurations, specific details will vary. Always verify your exact transmission model and specifications.
- Common Transmissions: Eaton Fuller Advantage Series (e.g., FO-16E318B-VXP), Eaton Fuller UltraShift PLUS, Allison 4000/4500 Series (e.g., 4500 RDS, 4000 EVS)
- OEM Fluid Spec (Eaton Fuller): Eaton PS-386 (synthetic transmission fluid), or equivalent meeting SAE 50 synthetic or 75W-90 synthetic gear lubricant standards. Refer to your owner's manual for specific Eaton Roadranger approved lubricants. Many Eaton transmissions use heavy-duty engine oils (e.g., 10W-30 or 15W-40) in specific applications; always consult your manual.
- OEM Fluid Spec (Allison): Allison TES 668™ or Allison TES 295® approved fluid. TES 668 is the latest standard, offering extended drain intervals and improved performance.
- Drain & Fill Capacity (Eaton Fuller): Varies significantly by model, typically 12-18 quarts (11-17 liters) for manual/AMT vocational transmissions. Refer to your specific transmission model's data plate or service manual.
- Full Overhaul Capacity (Eaton Fuller): Similar to drain and fill, as these transmissions are often filled to a specific level, not a
More specs for the 2020 International LT
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.
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.
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
Maintenance & repair guides
2020 International LT Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.