RAM CHASSIS CAB 2015 Owner's Manual page 565

Mileage or time passed
(whichever comes first)
Or Years:
Or Kilometers:
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent
trailer towing.
Change the transfer case fluid.
Inspect and replace PCV valve if
necessary.
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
2 3 4 5 6
X X
MAINTENANCE SCHEDULES 563
7 8 9 10 11
X
X
12 13 14 15
X X
X
8