If the dial indicator reading is smaller than the manu-
facturer’s specification, a shorter pin must be substituted. If
the dial indicator reading is larger than the manufacturer’s
specification, a longer pin must be substituted.
Install the governor in the case or on the output shaft,
as applicable, and install the extension housing. Then,
install a new seal on the extension housing, Figure 17-47.
Before installing the valve body, perform an air pres-
sure test on the transmission to make sure the clutch apply
pistons and servos are working properly. Air pressure
testing was discussed in Chapter 13. Figure 17-48 shows
air pressure being used to check piston operation on one
type of transmission.
After air pressure tests are complete, install the valve
body-to-case spacer plate, the spacer plate gaskets, and
any check balls in the transmission case. Carefully match
the holes in the spacer plate and the new spacer plate
gaskets to ensure proper fluid flow.
Install the valve body and a new oil filter. Then, install
the transmission oil pan using a new gasket. On a
transaxle, install the side valve body and oil pan, if neces-
418 Automatic Transmissions and Transaxles
Band apply
pin
Pin length
tool
A
B
Torque
wrench
Pin length tool
Window
Dial indicator
Servo piston selector
Indicator
base
Extension
housing
Special driving tool
Figure 17-47. After installing the extension housing, install a
new rear seal using the proper driver. Worn extension bushings
should also be replaced. (DaimlerChrysler)
Air gun
Dial indicator
used to measure
piston stroke
Brake piston
feed hole
Figure 17-48. Always perform an air pressure test on the
transmission before installing the valve body. Band movement
or a sharp thunk from the clutch packs indicates that the air
pressure is operating the holding members and that all seals
and passages should channel fluid properly. (DaimlerChrysler)
Figure 17-46. Some bands are adjusted using a dial indicator
and a special tool known as a servo piston selector. After
installing the tool and the dial indicator, the piston is pushed
downward and the indicator is read. (Ford)
Figure 17-45. A special tool must be used to adjust the band
on many modern transmissions and transaxles. A—The tool is
installed with the existing band apply pin. B—The band is
applied with the torque wrench. If the pin is the correct length,
a white line will appear in the tool’s window. (General Motors)