The BD Diesel Torq/UnLoc Kit (Part # 1030398) is designed to enhance transmission control and improve towing performance in heavy-duty applications. This advanced device allows precise command over the torque converter lock-up function, enabling drivers to optimize fuel efficiency, reduce transmission wear, and maintain consistent retarding force during towing or urban driving conditions. The kit offers multiple settings: Lock (Position 1) engages the lock-up clutch for low-temperature operation and effective exhaust braking, while Position 2 restores stock function or can be wired for unlock mode. Position 3 provides an AutoLoc feature, engaging lock-up only when the exhaust brake is active, making it suitable for daily driving in varying conditions. An Overdrive inverter option is included to start transmission in Drive mode, preventing early upshift into Overdrive when city driving, which is beneficial for maintaining engine braking and fuel economy. For vehicles equipped with a BD Valve Body with second gear lock-up, the lock-up can be set to hold until 5-10 mph for smoother operation. The Torq/UnLoc kit also prevents slippage and high oil temperatures, ensuring the transmission operates within safe limits under severe towing or high-stress conditions. Built for durability, it features a 12-month or 24,000-mile warranty, providing reliable performance for heavy-duty fleet and automotive use. Proper installation requires understanding your vehicle’s transmission specifications, and adherence to recommended setup procedures is critical for optimal results. This kit is suitable for 1997-2000 GMC C3500 trucks, among other compatible diesel and gas-powered heavy-duty vehicles, and is engineered by BD Diesel to meet demanding fleet requirements.
Features:
- Allows precise command of torque converter lock-up for improved fuel efficiency and reduced transmission wear
- Multiple operation modes including manual lock, stock, and auto-lock for versatile driving conditions
- Includes Overdrive inverter to prevent early upshift in city driving, optimizing engine braking and fuel economy
- Prevents slippage and high oil temperatures under severe towing conditions, ensuring drivetrain reliability
Fitment:
Chevrolet C1500 Base 1994 to 1997
Chevrolet C1500 Cheyenne 1994 to 1998
Chevrolet C1500 Silverado 1994 to 1998
Chevrolet C1500 WT 1994 to 1998
Chevrolet C2500 Base 1994 to 1997
Chevrolet C2500 Base 1999 to 2000
Chevrolet C2500 Cheyenne 1992 to 1998
Chevrolet C2500 LS 1999 to 2000
Chevrolet C2500 Silverado 1992 to 1998
Chevrolet C2500 WT 1994 to 1995
Chevrolet C2500 WT 1998
Chevrolet C3500 Base 1994 to 1997
Chevrolet C3500 Base 1999 to 2000
Chevrolet C3500 Cheyenne 1992 to 1998
Chevrolet C3500 LS 1999 to 2000
Chevrolet C3500 Scottsdale 1992
Chevrolet C3500 Silverado 1992 to 1998
Chevrolet K1500 Base 1994 to 1997
Chevrolet K1500 Cheyenne 1994 to 1998
Chevrolet K1500 Silverado 1994 to 1998
Chevrolet K1500 WT 1994 to 1998
Chevrolet K2500 Base 1994 to 1997
Chevrolet K2500 Base 1999 to 2000
Chevrolet K2500 Cheyenne 1992 to 1998
Chevrolet K2500 LS 1999 to 2000
Chevrolet K2500 Silverado 1992 to 1998
Chevrolet K2500 WT 1994 to 1995
Chevrolet K2500 WT 1998
Chevrolet K3500 Base 1994 to 1997
Chevrolet K3500 Base 1999 to 2000
Chevrolet K3500 Cheyenne 1992 to 1998
Chevrolet K3500 LS 1999 to 2000
Chevrolet K3500 Scottsdale 1992
Chevrolet K3500 Silverado 1992 to 1998
Dodge Ram 2500 Base 1994 to 2002
Dodge Ram 2500 Laramie 2003
Dodge Ram 2500 SLT 2003 to 2004
Dodge Ram 2500 ST 2003 to 2004
Dodge Ram 3500 Base 1994 to 2002
Dodge Ram 3500 Laramie 2003 to 2004
Dodge Ram 3500 SLT 2003 to 2004
Dodge Ram 3500 ST 2003 to 2004
GMC C1500 Sierra GT 1997
GMC C1500 Sierra SL 1994 to 1997
GMC C1500 Sierra SLE 1994 to 1997
GMC C1500 Sierra SLT 1994 to 1997
GMC C1500 Sierra Special 1994 to 1997
GMC C2500 Sierra 1992 to 1993
GMC C2500 Sierra SL 1994 to 2000
GMC C2500 Sierra SLE 1992 to 2000
GMC C2500 Sierra SLT 1994 to 2000
GMC C2500 Sierra SLX 1992 to 1993
GMC C3500 Sierra 1992 to 1993
GMC C3500 Sierra SL 1994 to 2000
GMC C3500 Sierra SLE 1992 to 2000
GMC C3500 Sierra SLT 1994 to 2000
GMC C3500 Sierra SLX 1992 to 1993
GMC K1500 Sierra SL 1994 to 1998
GMC K1500 Sierra SLE 1994 to 1998
GMC K1500 Sierra SLS 1995
GMC K1500 Sierra SLT 1994 to 1998
GMC K1500 Sierra Special 1994 to 1996
GMC K1500 Sierra Special 1998
GMC K2500 Sierra 1992 to 1993
GMC K2500 Sierra SL 1994 to 2000
GMC K2500 Sierra SLE 1992 to 2000
GMC K2500 Sierra SLT 1994 to 2000
GMC K2500 Sierra SLX 1992 to 1993
GMC K3500 Sierra 1992 to 1993
GMC K3500 Sierra SL 1994 to 2000
GMC K3500 Sierra SLE 1992 to 2000
GMC K3500 Sierra SLT 1994 to 2000
GMC K3500 Sierra SLX 1992 to 1993





















