Some 2011 Ford Crown Victoria vehicles equipped with a 4R75E transmission may exhibit an un-commanded torque converter clutch (TCC) apply or partial apply immediately after the 1-2 shift. This may result in the perception that the vehicle lacks power or the transmission is up-shifting too early.
DTC P1742 may be stored in the PCM. In some vehicles, while operating in manual 2nd gear and when coming to a stop, the vehicle may experience a loss of rpm.
1. Install IDS scan tool.
2. Road test the vehicle and 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. If TCC % is zero and TC SLIP ACT is less than 20 rpm, then inspect the number 7 check ball in the main control valve body for damage. Replace as required. If you receive any other reading, this bulletin does not apply. Perform normal diagnostics.
1L3Z-7C155-AA………Valve body upper gasket
1W7Z-7D100-AB………Valve body lower gasket
XT-10-QLV……………..Motorcraft Mercon LV ATF