Line Pressure Test - ATSG FORD 4R100 Manual

LINE PRESSURE SPECIFICATION CHART
Gear Idle
P, N 50-65 psi
R 70-100 psi
OD, M2 50-65 psi
M1 70-115 psi

LINE PRESSURE TEST

NOTE: Perform the line pressure test before
performing the "Stall" test. If the line pressure is
low at "Idle", DO NOT perform the "Stall" test or
further transmission damage will occur.
Do Not Maintain Wide Open Throttle in any gear
range for more than "5 Seconds" or transmission
damage may occur.
NOTE: If equipped, turn "Off" the PTO unit to
ensure proper test results.
Technical Service Information
LINE PRESSURE TEST
Stall
220-240 psi
136-156 psi
175-210 psi
Figure 24
AUTOMATIC TRANSMISSION SERVICE GROUP
F o r d F o r d
-B A
P -7 0 0 6
R F F 8 1
9 8
NOTE: On vehicles equipped with PTO units,
access to the line pressure port may require that you
remove the PTO unit depending on the type of unit
installed. If required, remove the PTO unit and
install PTO cover and gasket "Before" doing the
line pressure test.
1. Install a 300 psi line pressure gauge to the line
pressure tap, as shown in Figure 24.
2. Start the engine and check line pressure in all
ranges at "Idle". Refer to the chart shown in
Figure 24 to determine if they are within the
specifications.
3. If the line pressures are within the specifications
at "Idle", now you can perform the "Stall" test
to determine if specifications are okay there.
4. Once again, refer to the chart in Figure 24, to
determine proper specifications at "Stall".
Copyright © 2003 ATSG
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