Workshop

FORD 5R55S/5R55W

AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
69
Figure 115
Figure 114
Copyright © 2004 ATSG
REVERSE SERVO ASSEMBLY (Cont'd)
7. Install new reverse servo piston inner "D" ring
seal into the groove in reverse servo housing,
as shown in Figure 114, and lubricate with a
small amount of Trans-Jel®.
Note: If the original seal was an "O" ring
seal (Early Design), replace the reverse servo
housing and use the "D" ring seal. Refer to
Figure 114 for the cross section.
"Do Not" install a "D" ring seal into reverse
servo housing designed for the "O" ring seal.
8. Lubricate the reverse servo check valve with
Mercon® V, and install in housing, as shown
in Figure 115, followed by the spring and the
retainer.
9. Lubricate the reverse servo piston with a small
amount of Trans-Jel®, and install into reverse
servo housing, as shown in Figure 115.
REVERSE SERVO PISTON
INNER "D" RING SEAL
Continued on Page 70
EARLY
DESIGN
LATE
DESIGN
REVERSE SERVO
MOLDED PISTON
REVERSE SERVO
HOUSING
REVERSE SERVO
CHECK VALVE
REVERSE SERVO
CHECK VALVE
SPRING
REVERSE SERVO
CHECK VALVE
RETAINER
Do Not use early design "O" ring seal.
Replace reverse servo housing as necessary.

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