This might be it?
TSB 11-8-21
08/30/11
6F50/6F55 TRANSMISSION - SLUGGISH
ACCELERATION FROM 0-8 KM\H (0-5 MPH)
FOLLOWED BY A HARSH BUMP OR A SLIP ON
TAKE-OFF FOLLOWED BY A BUMP - BUILT ON OR
BEFORE 4/15/2011
FORD:
2010-2011 Taurus
2009 Edge, Flex
2010-2011 Edge, Flex
2011 Explorer
LINCOLN:
2010-2011 MKS
2009 MKX
2010-2011 MKT, MKX
This article supersedes TSB 11-5-6 to update the Part List.
ISSUE
Some 2009 Edge, MKX and Flex vehicles built on or after 5/4/2009, 2010-2011 Edge, Flex, MKS, MKT, MKX, Taurus, 2011 Explorer vehicles built on or before 4/15/2011 may have a sluggish acceleration or hesitation feel during a rolling stop 0-8 Km/h (0-5 MPH) followed by a harsh bump or feel like a slip on take-off from a stop followed by a harsh bump.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
This valve body modification is only available for transmissions originally built with MERCON® LV listed on the dipstick.
There is a new calibration and transmission valve body changes to correct this condition. The valve body change was to delete one hole in the valve body separator plate and remove one check ball from the valve body in the same area where the hole in the separator plate was deleted.
NOTE IF THIS PROCEDURE IS NOT FOLLOWED CORRECTLY, ADDITIONAL NEW CUSTOMER SYMPTOMS WILL BE PRESENT, LOSS OF REVERSE OR 2-3 SHIFT FLARE.
1. For all model years except 2009, proceed to Step 2. For 2009 model year vehicles, verify the transmission dipstick has MERCON(R) LV listed on the dipstick.
a. Yes - The dipstick has MERCON® LV listed on the dipstick, proceed to Step 2.
b. No - The dipstick does not have MERCON(R) LV listed on the dipstick, this procedure does not apply. Follow normal Workshop Manual diagnostics.
2. Reprogram the PCM to the latest calibration using IDS release 73.04 and higher. This new calibration is not included in the VCM 2011.5 DVD. Calibration files may also be obtained at the website.
3. Remove the transmission valve body. Refer to the Workshop Manual (WSM), Section 307-01.
4. Replace the separator plate in the valve body. The X identifies the hole in the valve body separator plate which will be eliminated. (Figure 1)
5. Remove one (1) check ball identified as X. (Figure 2)
a. Proper check ball locations on the remaining six (6) valve body check balls shown with arrows. (Figure 2)
6. Install transmission valve body. Refer to WSM, Section 307-01.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
IMPORTANT : Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
