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Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Change the automatic transmis-
sion fluid and filter(s) (66RFE
transmission).
X
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent
trailer towing.
XX X X X
Change the transfer case fluid. X
Inspect and replace PCV valve if
necessary.
X
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
8
MAINTENANCE SCHEDULES 509
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