Oil Dipstick
READ THIS THIS IS A LIST OF THINGS THAT CAN CAUSE THIS PROBLEM
ELECTRICAL ROUTINE
Powertrain Control System
· Electrical inputs/outputs, vehicle wiring harnesses, powertrain control module, SSA on, transmission range (TR) sensor
· Run On-Board Diagnostics tests. Refer to Powertrain Control/Emissions Diagnosis Manual for diagnosis.
HYDRAULIC/MECHANICAL ROUTINE
External Shift Linkage
· Damaged, out of adjustment
· Inspect and repair as necessary. Verify linkage adjustment. After
repairing linkage, verify that the transmission range (TR) sensor is
correctly adjusted.
Incorrect Pressures
· Low line pressure
· Check pressure at line pressure tap. Carry out Line Pressure and
Stall Speed Tests. Refer to Special Testing Procedures in this section.
If pressure is low, check the following possible components: main
control, pump assembly, reverse clutch assembly, low/reverse clutch
assembly.
Main Controls
· Bolts out of torque specification
· Adjust bolts to specification.
· Gasket damaged
· Inspect for damage. Repair as necessary.
· 1-2 shift valve, SSA, main regulator valve, low/reverse modulator
valve, low/reverse accumulator piston, pressure tap plate damaged,
missing, stuck, misassembled
· Inspect for damage. Repair as necessary.
· Separator plates damaged
· Inspect for damage. Repair as necessary.
· Hydraulic passages damaged
· Inspect for damage. Repair as necessary.
Pump Assembly
· Bolts out of torque specification
· Adjust bolts to specification.
· Gasket damaged
· Inspect for damage. Install new as necessary.
· Porosity/cross leaks/ball plug missing or leaking, plugged hole
· Install a new pump assembly.
· Pump support seal rings, No. 6 or No. 7, damaged
· Inspect for damage. Repair as necessary.
Reverse Clutch Assembly
· Carry out Air Pressure Test.
· Seals, piston damaged
· Inspect for damage. Repair as necessary.
· Ball check valve damaged
· Inspect for damage. Repair as necessary.
· Friction elements worn, severely damaged or misassembled
· Inspect for damage. Repair as necessary.
· Piston return spring damaged
· Inspect for damage. Repair as necessary.
· Reverse clutch hub to forward/coast/direct hub splines damaged
· Inspect for damage. Repair as necessary.
Low/Reverse Clutch Assembly
· Carry out Air Pressure Test.
· Seals or piston damaged
· Inspect for damage. Repair as necessary.
· Friction elements worn or severely damaged
· Inspect for damage. Repair as necessary.
· Piston return spring damaged
· Inspect for damage. Repair as necessary.
· Wave springs missing
· Inspect for damage. Repair as necessary.
· Piston bore damaged
· Inspect for damage. Repair as necessary.
Forward/Coast/Direct Clutch Cylinder
· Reverse seal rings damaged, missing, misassembled
· Inspect for damage. Repair as necessary.
Case
· Reverse to low/reverse clutch feeds have severe cross- leakage or porosity
· Carry out Air Pressure Test.
· Inspect for damage. Repair as necessary.
Reverse/Overdrive Gear Set
· Damaged
· Inspect for damage. Repair as necessary.
With all that said, you need to have it taken to either the Ford dealer
or transmission shop to pinpoint the exact cause of the problem. Either
way, it's likely that the transaxle is going to require removal and
disassembly to repair, if the TR sensor isn't the cause. You may print
this answer and bring it into the servicing tech, in order to
expedidite the diagnosis process. Hope this helps.