Fleece Performance AlliLocker Torque Converter Lockup Controller For 01-15 6.6 Duramax 1990-2022 Ford F-350 Rear Lift Method: Progressive-Rate Coil

Rear Lift Method: Progressive-Rate Coil Springs

No actuator calibration programming required

Rear lift block and longer U-bolts provide a level stance

Update Derringer software and calibration through iDash 1

Improves horsepower and torque output

Fleece Performance AlliLocker Torque Converter Lockup Controller For 01-15 6.6 Duramax 1990-2022 Ford F-350 Rear Lift Method: Progressive-Rate CoilThe Fleece FPE ALILKR AlliLocker Torque Converter Lockup Controller for your 2001 2015 GM Duramax allows complete control of your torque converter from the palm of your hand. The Fleece Performance AlliLocker allows you to bypass the TCM to lock unlock the torque converter on demand. Turn the bypass switch off, and the TCM regains control of the torque converter clutch. See operation guide below: The Allilocker operation is simple. Leave it in normal