PS Magazine - TB 43-PS-565
PS, The Preventative Maintenance Monthly
ISSUE 565
DECEMBER 1999
PS 565
3
PS 565
2
DEC 99
ill the transmission on a basic
model M998 work on a M998A2?
Will the front prop shaft on an
M998A2 work on an M1114?
Will the engine from an M998A1
work in a basic M998? (
Answers at
the end of this article.
)
Questions like these are common
these days, since the HMMWV has
so many different models and series
in the field.
There’s the original M998-series
trucks; the M998A1-series; the
M998A2-series; and the M1113 and
M1114 models.
To keep things straight in the
maintenance bay, here’s what each
series of models uses for running
gear:
HMMWV . . .
Basic M998-series
(except M1097)
M1097 and
M998A1-series
Engine and container:
•
6.2L post-1990, NSN 2815-01-314-
7940
•
6.5L detuned, NSN 2815-01-406-
6675 (1996)
•
6.5L detuned, NSN 2815-01-439-
6664 (1997)
Transmission:
3L80E, NSN 2520-01-161-2136
Transfer case:
242 model (three bolts holding
extension housing), NSN 2520-01-
356-9197 or 2520-01-452-8365 (with
container)
Front prop shaft (off front axle
differential):
NSN 2520-01-356-9189 (U-joint
repair kit, NSN 2520-01-189-2135)
Front prop shaft (off transfer):
NSN 2520-01-357-5043 (U-joint
repair kit, NSN 2520-01-189-2135)
Rear prop shaft:
NSN 2520-01-357-5044 (U-joint re-
pair kit, NSN 2520-01-189-2135)
Engine and container:
•
6.2L pre-1990, NSN 2815-01-231-3672
(used on serial numbers 1-99,999)
•
6.2L post-1990, NSN 2815-01-314-
7940 (used on serial numbers 100,000 and
above)
•
6.5L detuned, NSN 2815-01-406-6675
(1996)
•
6.5L detuned, NSN 2815-01-439-6664
(1997)
Transmission:
3L80E, NSN 2520-01-161-2136
Transfer case:
•
218 model, NSN 2520-01-163-4999 or
•
242 model, NSN 2520-01-409-2512
(Conversion kit, NSN 2520-01-434-0822,
installs the 242 model (slip-type yoke) in
trucks once the 218 model (bolt-type
flange) is no longer available)
Front prop shaft (off front axle
differential):
NSN 2520-01-200-3097
(U-joint re-
pair kit, NSN 2520-00-722-7074, con-
tains cross assembly, retaining rings
and bearing race caps)
Front prop shaft (off transfer):
•
with 218 model transfer installed—
NSN 2520-01-200-3096 (U-joint repair
kit, NSN 2520-00-722-7074)
•
with 242 model transfer installed—
NSN 2520-01-357-5043 (U-joint repair
kit, NSN 2520-01-189-2135)
Rear prop shaft:
•
with 218 model transfer installed on
trucks serial numbered 1-44,824 with
out parking brake MWO 9-2320-280-
35-1 applied—NSN 2520-01-171-8258
•
with 218 model transfer installed on
trucks serial numbered 44,825 and
above or with parking brake MWO 9-
2320-280-35-1 applied—NSN 2520-
01-346-1374
•
with 242 model transfer installed—
NSN 2520-01-459-0050 (U-joint repair
kit, NSN 2520-01-189-2135, for all rear
shafts)
i need
a
transfer
case
. can i use
one like
yours
?
i don't
know. you still
running a
218
?
nope!
he's got a
242
.
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