Trans problem

Could be this:LOW TRANS FLUID LEVEL &/OR SHIFT/ENGAGEMENT CONCERNS
TECHNICAL SERVICE BULLETIN
Reference Number(s): 97-12-13, Date of Issue: June 9, 1997
Superceded Bulletin(s): 96-20-18, Date of Issue: September 23, 1996
Related Ref Number(s): 96-20-18, 97-12-13
ARTICLE BEGINNING
DESCRIPTION
TRANSMISSION - C6, E4OD, AOD, 4R70W - LOW TRANSMISSION FLUID LEVEL AND/OR
SHIFT AND/OR ENGAGEMENT CONCERNS - 4X4 AND AWD VEHICLES ONLY
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. If 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.
FORD LIGHT
TRUCK:
1987-96 Bronco; 1987-97 F-150, F-250, F-350; 1996-97 Explorer; 1997
Expedition
LINCOLN-
MERCURY:
1997 Mountaineer
NOTE:
This bulletin supersedes Technical Service Bulletin 96-20-18 dated
September 23, 1996.
PARTS INFORMATION
PARTS INFORMATION
Part Number
Part Name
F77Z-7B215-AA
Transfer Case Input Seal