Fleece Performance AlliLocker Torque Converter Lockup Controller – 2001-2016 Duramax (FPE-ALILKR)

Take full manual control of your Allison torque converter with the Fleece AlliLocker. Designed for 2001–2016 GM Duramax trucks equipped with the Allison 1000 transmission, this controller lets you lock or unlock the torque converter clutch (TCC) on demand by bypassing the Transmission Control Module.

Key Benefits

• Instant on-demand lockup control from the driver’s seat
• 100% code-free operation when used on the track
• Simple dual-switch design: leave it in normal mode for everyday driving, flip the bypass switch when you want full control
• Reverts completely to stock TCM control when the bypass is turned off

How It Works

• Bypass switch OFF → TCM controls the torque converter normally
• Bypass switch ON → You control the TCC with the latching lock switch
  • Switch down = locked
  • Switch up = unlocked

Fitment

• 2001–2016 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD
• LB7, LLY, LBZ, LMM, and LML Duramax engines with Allison 1000 automatic transmission

Important Notes

This product is intended for closed-course race use only (sled pull, drag strip, etc.). It is not designed for public roadways. Always disengage the bypass switch and unlatch the lock switch when not in use.