The 2026 Jeep Gladiator belongs to the JT generation (refreshed) (2024-present), built with 3.6L Pentastar V6 only. It takes 0W-20 full synthetic. Oil changes run 10,000 miles. This sits in the middle of the generation run, generally the most sorted point in a design before end-of-run cost reductions.
A 2026 Jeep Gladiator is brand new in 2026, which at an average 12,000 miles a year puts it around 0 miles - still under warranty. At roughly 0 miles the only things due are oil, tire rotation and inspections. The most valuable thing you can do this early is start a service record - it is worth real money at resale and it is nearly impossible to reconstruct later. On that mileage estimate the next milestone is 30,000 miles - engine air filter, cabin filter and a brake inspection - roughly 2.5 years away at average use.
The fault most worth knowing about on this generation is Electric power-steering pump connector overheating/fire risk (recall 26V363000, issued 2026-06, covers trucks built through December 2, 2024). Owners also report Death wobble remains a solid-front-axle possibility across the refresh; and 3.6L Pentastar oil-filter-housing leaks (a long-running issue on this engine family). None of these are certainties on any individual vehicle - they are the patterns worth checking for when you buy or when a symptom appears.
Track your 2026 Jeep Gladiator service history free with the ServiceSage maintenance tracker, or compare it against other model years on the Jeep Gladiator maintenance schedule hub.
| Interval | Service |
|---|---|
| Every 4,000 mi (severe duty / off-road) | Engine oil & filter change, Rotate tires, Inspect axle vents, skid plates, and undercarriage, Inspect for off-road damage |
| Every 10,000 mi / 12 months | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar |
| Every 20,000 mi | Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts |
| Every 30,000 mi | Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses |
| Every 36 months (brake fluid) | Replace brake fluid (DOT 3) |
| Every 60,000 mi | Front and rear axle (differential) fluid change (Dana 44 AdvanTEK), Transfer case fluid change (ATF+4 or BW44-44), Automatic transmission fluid service (severe duty), Manual transmission fluid change (if equipped) |
| Every 100,000 mi | Replace spark plugs (3.6L Pentastar, 6 plugs), Inspect PCV valve, Inspect water pump |
| Every 120,000 mi | Automatic transmission fluid & filter (normal duty), Inspect valvetrain |
| Every 150,000 mi | Engine coolant flush (Mopar OAT / HOAT), Inspect entire cooling system |
The table above is indexed by service interval. This is the same schedule indexed by odometer reading, for when you know your mileage and want the list. If your odometer sits between these figures, work back to the last one you passed and catch up anything skipped.
| Odometer | Service due |
|---|---|
| 30,000 mi (48,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses. |
| 60,000 mi (97,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses, Front and rear axle (differential) fluid change (Dana 44 AdvanTEK), Transfer case fluid change (ATF+4 or BW44-44), Automatic transmission fluid service (severe duty), Manual transmission fluid change (if equipped). |
| 90,000 mi (145,000 km) | Same as the 30,000 mi service. |
| 100,000 mi (161,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Replace spark plugs (3.6L Pentastar, 6 plugs), Inspect PCV valve, Inspect water pump. |
| 120,000 mi (193,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses, Front and rear axle (differential) fluid change (Dana 44 AdvanTEK), Transfer case fluid change (ATF+4 or BW44-44), Automatic transmission fluid service (severe duty), Manual transmission fluid change (if equipped), Automatic transmission fluid & filter (normal duty), Inspect valvetrain. |
| 150,000 mi (241,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses, Engine coolant flush (Mopar OAT / HOAT), Inspect entire cooling system. |
| 200,000 mi (322,000 km) | Same as the 100,000 mi service. |
| Fastener | Torque | Size |
|---|---|---|
| Lug nut | 130 ft-lbs (176 Nm) | 21mm |
Maintenance keeps these away, but when the dash does light up these are the codes this vehicle throws most often - each with what it means and what the repair actually costs.