New Problems Facing the 09G
Figure 5: A dull bore is a sign of very light to no wear on a valve bore.
As discussed earlier, the
sleeve for the K2 teflon seal-
ing rings can spin in the case
(figure 7). This can cause the
transmission to shift into neu-
tral on the 3-4 shift.
You can check for this
problem before removing the
transmission by installing a
pressure gauge on the K2
pressure tap (figure 8). Then
drive the vehicle, and check
the pressure during the 3-4
shift.
When the transmission
shifts from 3
rd
to 4
th
, the
pressure in the K2 clutch cir-
cuit should rise to 65-90 PSI.
• If the pressure doesn’t
rise, look for a valve
body problem such as a
sticking valve or faulty
solenoid.
• If the pressure rises nor-
mally but the transmis-
sion shifts into neutral,
the sleeve is probably
rotated in the case.
Figure 6: A shiny bore that may also have a ridge is a sign of a worn valve bore.
8 GEARS January/February 2010
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