A/T - Low Transmission Fluid/Shift/Engagement Concerns
Article No.97-12-13
06/09/97
TRANSMISSION - C6, E4OD, AOD, 4R70W - LOW
TRANSMISSION FLUID LEVEL AND/OR SHIFT
AND/OR ENGAGEMENT CONCERNS - 4X4 AND AWD
VEHICLES ONLY
LIGHT TRUCK:
1987-96 BRONCO
1987-97 F-150, F-250, F-350
1996-97 EXPLORER
1997 EXPEDITION, MOUNTAINEER
This TSB article is being republished in its entirety to include 1997 model year vehicles.
ISSUE:
The transmission may have low fluid level and/or may have either a shift concern and/or an engagement concern. This may be caused by transmission fluid leaking from the transmission into the transfer case through the transfer case input seal.
ACTION:
Replace the transfer case input seal. The new seal should reduce the possibility of fluid leaking from the transmission into the transfer case. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1. Check the transmission fluid level. It the transmission fluid level is low and there are no visible signs of a leak, check the transfer case fluid level. The level of fluid in the transfer case should be just below the fill plug hole.
2. If the transfer case fluid level is overfull and the transmission fluid is not burnt, remove the transfer case from the vehicle following the procedure outlined in the appropriate model/year Service Manual.
3. Remove the transfer case input seal. Clean the seal bore in the transfer case.
4. Install a new Transfer Case Input Seal (F77Z-7B215-AA)
5. If the transmission fluid is burnt, repair the transmission as required and then replace the transfer case seal as outlined in Step 3.
PART NUMBER PART NAME
F77Z-7B215-AA Transfer case Input Seal
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 96-20-18
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
971213A Replace Transfer Case 1.6 Hrs.
Input Seal - 1987-96
F-150-350, Bronco And
1997 F-250-350
971213B Replace Transfer Case 2.7 Hrs.
Input Seal - 1996-97
Explorer AWD And 1997
Mountaineer
971213C Replace Transfer Case 2.1 Hrs.
Input Seal - 1997 F-150,
Expedition
DEALER CODING
CONDITION
BASIC PART NO. CODE
7B215 D8
OASIS CODES: 501000, 502000, 503000, 504000, 506000, 510000