F 150 2WD V8-5.4L Flex Fuel (2008)
Torque Converter Clutch: All Technical Service Bulletins
A/T - Uncommanded TCC Lock Up On 1-2 Upshift
TSB 09-20-14
10/19/09
UN-COMMANDED TCC APPLY ON THE 1-2 SHIFT
CAUSING PERCEPTION OF HESITATION AND/OR
LACK OF POWER DURING SHIFT
FORD:
2005-2010 Crown Victoria
2005-2006 Expedition
2005-2010 E-150, E-250, E-350, F-150
LINCOLN:
2005-2010 Town Car
2006-2008 Mark LT
MERCURY:
2005-2010 Grand Marquis
This article supersedes TSB 6-22-7 to update the Issue Statement, vehicle model years and model line covered.
ISSUE
Some 2005-2010 vehicles equipped with a 4R70/75E-W transmission may experience an un-commanded torque converter clutch (TCC) apply or TCC
partial apply immediately after the 1-2 shift. This may result in the perception that the vehicle lacks power or that the transmission is up-shifting too
early. Additional symptoms of uncommanded TCC apply when coming to a stop (before the 2-1 downshift is commanded), are engine stalling or lugging
when engaging manual 2nd while at a stop and code P1742 may be present in continuous memory. However, the vehicle should operate normally in
park, reverse, neutral and manual 1st gear.
ACTION
Follow the Service Procedure for verification and repair.
SERVICE PROCEDURE
1. Monitor (TCC %) solenoid command state - duty cycle and (TC SLIP ACT) torque converter clutch slippage - RPM, while in 2nd, 3rd or 4th gear
with a TCC % reading 0.
a. If TCC % = 0 and TC SLIP ACT = less than 20 RPM then inspect the number 7 check ball in the main control valve body for damage. Replace
as required following the appropriate Workshop Manual (WSM) under Disassembly and Assembly of Subassemblies - Main Control Valve
Body. (Figure 1)