PS Magazine - TB 43-PS-637

PS, The Preventative Maintenance Monthly

ISSUE 637

DECEMBER 2005
PS Magazine - TB 43-PS-637 - Page 7 of 33
S
cattered cargo is the last thing
a driver wants to see while
looking in his rearview mirror.
To keep cargo in place, use
the adjustable cargo net and
rack kit that comes with NSN
fits above the vehicle’s cab. It
fits both the HEMTT and PLS
and requires only a
9
⁄
16
-in sock-
et wrench for installation.
The net fastens around the
rack. A three-position molded
nylon clamp locks a cinching
rope, which goes around the
entire net. Each net comes with
a storage bag and attachment
instructions.
By the way, these kits will
NOT
fit HEMTTs and PLSs with up-armor kits
installed on the vehicle.
Cargo Net and Rack
PS 637
DEC 05
10
M998A2-Series and Up-armored HMMWVs…
4L80E Tranny Troubleshooting
reports from swa indicate
that some drivers and unit
mechanics don’t quite
understand the operation
and troubleshooting of
the 4L80e transmission in
all m998a2-series and
up-armored hmmwvs.
Just about every-
thing unit level
operators and
mechanics need to
know about the 4L80E
can be found in
TMs 9-2320-280-10 and
-20-1 and TMs 9-2320-
387-10 and -24-1.
Operators, when the
transmission will
not
shift into third gear
after reaching about
35 mph, don’t exceed
35 mph and get your
truck to your mainte-
nance facility
ASAP.
Mechanics, when a
driver tells you about
the trouble mentioned
above, go directly to
Section 2-35 of the
-280-20-1 TM or Section
2-40 of the -387-24-1
TM (or find both in
ETM 0030).
If a HMMWV with a newly installed transmission goes
into “limp mode” (won’t shift out of second gear) right
away, it could have the wrong erasable programable
read-only memory (EPROM) chip installed. 1995 and 1996
Model 4L8OE transmissions require EPROMs that are
matched to the model year of the transmission. 1997 and
newer transmissions can use the latest model of EPROMs.
For training or assistance to troubleshoot the 4L80E
transmission, contact your local TACOM logistics assis-
tance representative (LAR).
You will also need some special tools noted in the TMs:
• Diagnostic switch cable, NSN 6150- 01-410-8215
• Throttle position switch (TPS) cable, NSN 6150-01-412-7774
• TPS block gauge, NSN 4820-01-179- 4869
use nsn 2590-01-
522-8060 to get
an adjustable
cargo net and
rack kit.
Here’s
some
extra
info…
HEMTT, PLS…
Everything
you need to
troubleshoot
can be found in
these sections.
637.10-11(C!).qxd
11/4/05
6:18 PM
Page 1
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