TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 573 of 951
TM 9-2320-280-20-2
5-2
Change 3
5-2. TRANSMISSION SERVICE
This task covers:
a.
Draining Fluid
c. Transmission Filter Installation
b.
Transmission Filter Removal
d. Replenishing Fluid
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Nonmetallic round seal (Appendix G, Item 286)
Filter assembly (Appendix G, Item 31) (3L80)
Gasket (Appendix G, Item 48) (3L80)
Filter element kit (Appendix G, Item 33) (4L80-E)
Gasket (Appendix G, Item 58) (4L80-E)
Two locknuts (Appendix G, Item 103)
Transmission fluid (Appendix C, Item 26 or 27)
Drycleaning solvent (Appendix C, Item 18)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
General Safety Instructions
Drycleaning solvent is flammable and will not be
used near an open flame.
a. Draining Fluid
b. Transmission Filter Removal
NOTE
Perform steps 1 through 5 for 3L80 transmissions only.
1.
Remove thirteen capscrews (6), oil pan (3), and gasket (5) from transmission (4). Discard gasket (5).
2.
Clean gasket (5) material from transmission (4) and oil pan (3) mating surfaces.
3.
Remove capscrew (11), oil filter (10), and spacer (9) from
transmission (4).
4.
Pull suction tube (8) from oil filter (10) and remove seal (7). Discard seal (7).
WARNING
Drycleaning solvent is flammable and will not be used near an open
flame. A fire extinguisher will be kept nearby when the solvent is
used. Use only in well ventilated places. Failure to do this may
result in injury to personnel and/or damage equipment.
5.
Clean suction tube (8) and oil pan (3) thoroughly with drycleaning solvent.
NOTE
• Transmission service for the 3L80 and 4L80-E transmissions is
basically the same. Differences are noted.
• Do not shift through driving gear ranges when warming trans-
mission fluid for removal. Shifting through driving gear ranges
is a procedure used only when refilling transmission fluid.
• Transmission should be warm when draining fluid.
• Have drainage container ready to catch fluid.
1.
Remove drainplug (1) and gasket (2) from oil pan (3). Allow fluid to drain.
NOTE
Inspect fluid for grit, foaminess, and/or milkiness. If present, notify
DS maintenance.
2.
Install gasket (2) and drainplug (1) in oil pan (3) and tighten drain plug (1) to 20 lb-ft (27 N
•
m).
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