Jeep WRANGLER 2017 Owner's Manual page 373

Mileage or time passed (which-
ever comes first)
Or Years:
Or Kilometers:
Change transfer case fluid if using
your vehicle for any of the follow-
ing: police, taxi, fleet, or frequent
trailer towing.
Inspect and replace PCV valve if
necessary.
Change front and rear axle fluid if
using your vehicle for police, taxi,
fleet, off-road or frequent trailer
towing.
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
2 3 4 5 6
X
X
SERVICING AND MAINTENANCE 371
7 8 9 10 11
X
X
12 13 14 15
X
X
8