MIL-DTL-62099D(AT)
3.3 Operating requirements. Each assemble shall provide the following functional,
operational, and performance capabilities (see 4.3)
3.3.1 Oil. Oil conforming to Grade 1 of MIL-L-21260, or equivalent shall be used during
each transmission evaluation sequence. After the transmission is installed in its intended vehicle,
oil conforming to MIL-L-46167, or equivalent shall be used when the transmission is operated in
ambient temperature below 0 degrees Fahrenheit (°F). Oil conforming to grade 10 of
MIL-PRF-2104, or equivalent shall be used when the transmission is operated in ambient
temperature above 0°F (see 4.2.3).
3.3.1.1 Temperature range. The transmission converter out oil temperature shall not
exceed 300°F during each transmission evaluation sequence and production runs.
3.3.2 Warm-up. During the warm-up period the transmission shall show no evidence of
mechanical malfunction and shall maintain an oil sump temperature of between 160 and 200°F
(see 4.3.1).
3.3.3 Functional pressure and flow requirements. With the transmission operating as
indicated in table I, the transmission shall meet the functional pressure and flow requirements
indicated therein (see 4.3.2).
TABLE I. Functional pressure and flow requirements.
Item
Reverse operation Forward operation
Throttle valve (TV) lever position
Full on
Full on
Range selector lever position
Rev
1-3
Input speed, revolutions per minute (rpm)
2180 - 2220
2980 - 3020
Output torque, pound-feet (lb-ft)
No Load
No Load
Main oil pressure, pounds per square inch (psi)
275 to 340
Lockup clutch oil pressure, psi
0
120 to 150
Cooler "out" oil pressure, psi
10 to 30
3.3.4 Automatic range upshift at detent position (TV). The automatic upshifts shall occur
as specified in table II with the TV lever at the detent position and the range selector lever in the
selected range. Lockup clutch pressure shall drop momentarily during the shift and rise again
when shift is completed (see 4.3.3).
TABLE II. Automatic range upshift.
Item
Input speed, rpm
Range selector lever
Min.
Max.
1-3 position
1-2 shift
3400
3600
2-3 shift
3400
3600
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