Ford 2003 Mustang Workshop Manual page 94

Bump—occurs
when shifting
from PARK to
a drive or
reverse
position.
Similar to
Clunk but with
no sound
Buzz or hiss
Vibration—a
high frequency
(20–80 Hz) that
is felt through
the seat or
gear shifter.
Changes with
engine speed
Shutter or
chatter—
occurs with
light to medium
acceleration
from low
speeds or a
stop
Pinpoint Tests
The pinpoint tests are a step-by-step diagnostic process designed to determine the cause of a
Initial gear
engagement.
Incorrect driveline
angles.
Worn or damaged
main control
solenoids or valves.
Transmission cooler
lines grounded out.
Flexplate to torque
converter nuts loose.
Fluid filler tube
grounded out.
Shift cable incorrectly
routed, grounded out
or loose.
Electrical
inputs/outputs.
Vehicle wiring
harness.
Incorrect
inputs/outputs from
the powertrain control
module (PCM), digital
transmission range
(TR) sensor, brake
pedal position (BPP)
sensor, throttle
position (TP) sensor,
transmission speed
sensor (TSS), output
speed shaft (OSS)
sensor or the torque
converter clutch
(TCC).
Acceptable condition.
CHECK for correct driveline
angles. REPAIR as
necessary. REFER to
205-00 .
Using a transmission tester,
ACTIVATE the solenoids to
duplicate sound. INSTALL
new components as
necessary. REFER to
307-01 .
CHECK the transmission
cooler lines. REPAIR as
necessary.
CHECK the flexplate nuts.
TIGHTEN to specification.
REFER to Section 307-01
CHECK the fluid filler tube.
REPAIR as necessary.
CHECK the shift cable.
REPAIR as necessary.
Section 307-05 .
CARRY OUT a Torque
Converter Clutch Operation
Test. RUN on-board
diagnostics or self-test.
REFER to Section 307-01
CLEAR the DTC's, ROAD
TEST and RERUN on-board
diagnostics or self-test.
Section
Section
.
.