A/T - E4OD TCIL Flashing/DTC's 62/628/1728 Stored
Article No.98-4-19
03/02/98
^ 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
LIGHT TRUCK:
1989-97 F SUPER DUTY, F-250 HD, F-350
1989-98 ECONOLINE, F-150, F-250 LD
1990-96 BRONCO
1997-98 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