PS Magazine - TB 43-PS-584

PS, The Preventative Maintenance Monthly

ISSUE 584

JULY 2001
PS Magazine - TB 43-PS-584 - Page 5 of 32
M
aintaining the 4L80E transmission used in the M998A2-series HMMWVs, the
M1113, M1114 and the M1123 is a bit different than working on the 3L80 used in
the basic and A1-series trucks.
Without specific tools and training, you will have problems.
First of all, you need the diagnostic switch cable assembly and case from the spe-
cial tools kit, NSN 5180-01-410-8467, that should have been fielded with your
truck. The assembly and case are Items 32 and 33 in Fig 439 of TM 9-2320-280-
24P-2. Without the assembly, you will not be able to diagnose the fault codes.
You also need throttle positioning sensor gauge block, NSN 4820-01-179-
4869, which is not shown in the TM at all. You can make your own block,
though, and save some money. Here's the info:
You'll need a 6-in piece of wire, NSN 9505-00-596-1638, and a piece of
metal bar, NSN 9510-00-542-2435, that's 2 inches long.
Once the wire and bar have had all burrs and sharp edges removed, weld the
wire to the bar as shown.
PS 584
JUL 01
6
HMMWV.
..
M998A2
To help you through the maintenance
process, you also need a training tape,
TVT 55-62,
HMMWV A2 Electronic 4-
speed Transmission,
available from your
local TSC. It can also be ordered over
the
Internet
from
the
Defense
Automated Visual Information System/
Defense
Instructional
Technology
Information System (DAVIS/DITIS).
Go to their web site at
http://dodim-
agery.afis.osd.mil/
. Once there, click on
DODVI
Productions/IMT
Products
(DAVIS/DITIS). Then click on PIN/ICN
Search. Do an ICN search for TVT 55-
62, and follow the ordering info.
You can also order by:
E-mail:
vibuddy@hq.afis.osd.mil
Fax: DSN 795-6106, (717) 895-6106
Mail:
Joint Visual Information Services
Distribution Activity
Warehouse 3/Bay 3
11 Hap Arnold Blvd
Tobyhanna, PA 18466-5102
Include your name, full military mail-
ing address, the title and PIN (711363)
of the film, format (VHS) and the quan-
tity of films you need. APO addresses
must include a unit/box number, CMR
box number or PSC box number.
Don’t worry.
Your checkup
says You
are
OK!
Use diagnostic switch cable
assembly to maintain 4L80E
transmission
Note: cable and wire shortened for drawing
6.00
.25
.646
REF
(.06)
(.06)
Wire,
2.00
.645
.646
Transmission Update
side view
Dimensions for
Sensor Gauge
Block
.44
Metal bar,
End
View
584. 06-07 (C)
6/3/01
4:19 PM
Page 1
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