Fulltext TSBs

Technical Service Bulletins

TSB
98-4-19
  • LAMP – FLASHING TRANSMISSION CONTROL INDICATOR LAMP (TCIL) WITH DIAGNOSTIC TROUBLE CODES (DTCS) 62, 628 AND/OR 1728 STORED IN MEMORY
  • TRANSMISSION – E4OD – FLASHING TRANSMISSION CONTROL INDICATOR LAMP (TCIL) WITH DIAGNOSTIC TROUBLE CODES (DTCS) 62, 628 AND/OR 1728 STORED IN MEMORY
Publication Date: MARCH 2, 1998

LIGHT TRUCK:
1989-1997 F SUPER DUTY, F-250 HD, F-350
1989-1998 ECONOLINE, F-150, F-250 LD
1990-1996 BRONCO
1997-1998 EXPEDITION
1998 NAVIGATOR

This TSB article is being republished in its entirety to correct the vehicles listed.

ISSUE:

Some vehicles may exhibit a flashing Transmission Control Indicator Lamp (TCIL) and Diagnostic Trouble Codes (DTCs) 62, 628, and/or 1728 may be stored in memory. These DTCs can be set by any internal transmission element slippage or potentially by torque converter slippage.

ACTION:

Refer to the following text when servicing these codes.

NOTE:WHEN SERVICING A VEHICLE WITH A FLASHING TCIL WITH DTCS 62, 628 AND/OR 1728, DO NOT REPLACE THE TORQUE CONVERTER UNLESS PROPER DIAGNOSIS HAS PROVEN THE TORQUE CONVERTER TO BE THE CAUSE.

Always verify the customer concern. Proper diagnosis for DTCs 62, 628 and/or 1728 may require talking to the customer to find out if there were any other symptoms associated with the TCIL flashing, (i.e., shift concerns, erratic/early/late, proper torque converter operation, etc.), prior to noticing the TCIL flashing.

Prior to transmission repairs for DTCs 62, 628 and/or 1728 or investigating other causes, repair all non-related transmission DTCs first, then repair all other transmission DTCs other than 62, 628 and/or 1728.

Some of the other causes that may result in DTCs 62, 628 and/or 1728 are as follows:

  • Aftermarket modifications (i.e., performance enhancers, electrical modifications, etc.)
  • Missing shifts (some/all)
  • Transmission fluid leakage (internal and/or external)
  • Erratic shift timing
  • Valves, springs or retainers in the main control/accumulator body not assembled correctly, binding or sticking
  • Check balls missing and/or mislocated. Damaged, unable to seal/seat properly
  • Higher or lower than normal line pressure
  • Transmission fluid restrictions and/or level
  • Erratic/inoperative vehicle speed and/or rpm sensor
  • Poor engine performance concerns

Any vehicle system concerns that could cause the strategy to detect a perceived internal slippage or change in the expected rpm of internal transmission rotating components may cause DTCs 62, 628 and/or 1728 to set.

NOTE:ONCE DTCs 62, 628 AND/OR 1728 SET, OTHER TRANSMISSION FUNCTIONAL DTCs MAY NOT SET.

OTHER APPLICABLE ARTICLES:

94-2-26,96-10-14

SUPERSEDES:

98-1-23

WARRANTY STATUS:

Information Only

OASIS CODES:

501000, 502000, 504000, 510000, 614000, 698298


Copyright 1998 Ford Motor Company