|FORD:||1997-1999 CROWN VICTORIA, MUSTANG, ECONOLINE, EXPEDITION, EXPLORER, F-150, F-250 LD|
|LINCOLN:||1997-1998 MARK VIII|
1997-1999 TOWN CAR
|MERCURY:||1997-1999 GRAND MARQUIS, MOUNTAINEER|
A perceived 2-3 delayed upshift, primarily when the transmission is cold, may be evident on some vehicles.
The 2-3 shift may be delayed approximately 14-24 km/h (9-15 mph) when compared to the shift speed charts listed in the appropriate Service or Workshop Manual.
A leaking 2-3 accumulator may cause Diagnostic Trouble Code (DTC) P0782.
Verify if delayed upshift is normal cold shift scheduling or a possible leak past the large diameter 2-3 accumulator seal. Refer to the following Service Procedure for details.
- Using New Generation Star (NGS) Tester or Scan Tool, perform all self tests and record DTCs.
- Monitor rpm, and gear command Parameter Identification Displays (PIDs) with the NGS Tester during the 2-3 shift.
- If engine rpm decreases within 1-2 seconds after the gear command has changed on the NGS Tester, then vehicle has upshifted properly and no repair is necessary. If engine rpm does not drop within 1-2 seconds, continue to Step 4.
- If engine rpm does not drop when the PCM commands third gear, then replace the 2-3 accumulator piston using the revised Accumulator Piston (F7AZ-7H292-AB). Refer to the appropriate Service or Workshop Manual for replacement procedure.
|PART NUMBER||PART NAME|