Ford 2003 Mustang Workshop Manual page 2392

Shift Concerns: Feel — Soft/Slipping
Possible Component
213 — ELECTRICAL ROUTINE
Powertrain Control System
· Electrical inputs/outputs,
vehicle wiring harnesses,
PCM, EPC solenoid, OSS
· Engine driveability concerns
313 — HYDRAULIC/MECHANICAL ROUTINE
Fluid
· Incorrect level
· Condition
Incorrect Pressures
· Low line pressure, low EPC
pressure
Main Controls
· Main regulator valve,
overdrive servo regulator
valve stuck, damaged or
assembled incorrectly
· EPC solenoid stuck or
damaged
Case
· 1-2 accumulator stuck or
damaged
Filter and Seal Assembly
· Filter plugged, damaged
· Seal damaged or cut
Shift 1-2, Routine 320
Shift 2-3, Routine 321
Shift 3-4, Routine 322
Shift 4-3, Routine 323
Shift 3-2, Routine 324
Shift 2-1, Routine 325
· Carry out Self-Test. Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System.
Pinpoint Test E . Repair as required. Clear DTCs, road test and
repeat Self-Test.
· Refer to Routine 253.
· Adjust fluid to correct level.
· Inspect condition of fluid.
· Check pressures at line and EPC taps; refer to Line Pressure
Chart for specifications. If pressures are low or all shifts are
soft/slipping, go to main controls. If pressures are OK and a
specific shift is soft/slipping, refer to the following routine(s) for
further diagnosis:
Shift 1-2, Routine 320
Shift 2-3, Routine 321
Shift 3-4, Routine 322
Shift 4-3, Routine 323
Shift 3-2, Routine 324
Shift 2-1, Routine 325
· Inspect for damage. Repair as required.
· Inspect for damage and contamination. Carry out EPC tests in
Routine 213. Repair as required.
· Inspect for damage. Repair as required.
· Inspect for damage. Install a new filter as required.
· Inspect for damage. Replace as required.
Reference/Action
Go To Pinpoint Test D or Go To