Fleece FPE-ALILKR AlliLocker Allison Torque Converter Controller | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Hands-on control of torque converter lockup
• Bypasses factory TCM for direct control
• Lock and unlock converter on demand
• Code-free installation and operation
• Switch-controlled bypass and lock modes
• Compatible with 2001-2016 GM 6.6L Duramax
• Ideal for drag racing and sled pulling
• Enables faster and firmer launches
• Quick toggle between manual and stock control
• Compact controller fits easily in cab
• Enhances performance during closed course use
• Designed for race applications only

Take Full Command Of Your Converter At The Flip Of A Switch

If you're building a race-ready Duramax and want more control over your drivetrain, the Fleece AlliLocker is a must-have tool in your setup. This controller lets you take manual control of your torque converter lockup, giving you the ability to lock or unlock it on demand, right from the cab. Whether you're staging for a drag pass or getting ready to launch on a sled pull, having that control makes all the difference in how your truck responds. It’s easy to use, requires no code flashing, and delivers the kind of hands-on feel that serious diesel enthusiasts crave. When you're done and want to return to normal street operation, just flip the switch and the factory TCM takes over again. Simple, effective, and race-bred, this is about putting power where and when you need it. If you’re chasing performance on the track or dirt, this gives you a serious edge.

Built For Precision Performance In High Load Applications

The Fleece FPE-ALILKR AlliLocker is designed for 2001-2016 GM Silverado and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax and Allison transmission. By bypassing the factory transmission control module, it enables direct engagement of the torque converter clutch, letting you lock or unlock manually during high-load racing scenarios. This is particularly useful in closed-course environments where timing your converter lockup can improve launch consistency and reduce slip under heavy throttle. The unit is 100 percent code-free, meaning it installs cleanly without needing ECU or TCM tuning. A simple switch setup allows for quick toggling between manual and stock control, while the compact controller fits neatly inside the cab. It’s built for durability and responsiveness, giving performance drivers an advantage when torque management matters most. Note that this product is intended for race-use only and should not be used on public roads. Always disengage the system when not in use to prevent unnecessary driveline stress.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Compatible with 2001-2016 GM 6.6L Duramax trucks
• Works with Allison transmissions found in 2500HD and 3500HD models
• Allows manual control of torque converter clutch
• Bypasses the factory TCM when engaged
• Factory control resumes when bypass switch is off
• No tuning or code flashing required for operation
• Designed for race-use on closed course environments only
• Do not use on public roadways under any circumstance
• Always disengage bypass and unlock switch when not in use
• Ideal for drag racing, sled pulling, and high-performance builds
• Controller installs easily inside the vehicle cabin