BD Diesel USA is a performance-oriented company specializing in high-quality diesel and heavy-duty truck components and upgrades. Their products are engineered to handle high pressure, high temperature, high load, and extended operation, not just occasional use. With years in the field (including intensive hours of idling, towing, and heavy usage), the BD Diesel's engineering and R&D is informed by real use cases.
Currently, exhaust brake usage can cause high temperatures in the automatic Tranmission due to Torque Converter slippage, and, only 10 percent to 80 percent of the retarding force is transferred through the fluid coupling of most Torque Converters.
The BD Torq/UnLoc commands the lock-up clutch of the Torque Converter to stay engaged when the BD Exhaust Brake is activated.
This allows for up to 100 percent of the retarding force to be transferred in 3rd and 4th gear and the Tranmission oil temperature to remain low because of little to no slippage occurring when the converter is in these selected gears.
The BD Torq/UnLoc is also able to prevent the ECM from activating the lock-up clutch when such an action would drag the engine rpm out of the optimum torque range, or, when traveling at such speeds that would cause the ECM to cycle the lock-up clutch in and out.
Install Time:
2 Hours
Warranty:
Parts
- 12-Months
- 24,000 Miles
Emissions:
This product does not require an EO in California. By nature of its design, it is legal for sale and use in all 50 states. Replacement Parts included. (EMS:4)
Features:
- Prevent the ECM from activating the lock-up clutch when such an action would drag the engine rpm out of the optimum torque range, or, when traveling at such speeds that would cause the ECM to cycle the lock-up clutch in and out
- Maintains lock-up when the exhaust brake is activated
- Ensuring 100 percent of the retarding force is being transferred in 3rd and 4th gears
- Prevents slippage and subsequent high oil temperatures
Installation Notes:
Professional installation is required.
Specifications:
EMS Code: 4.
Installation Time: 2 Hours.
Warranty: 12-Months/24,000 Miles.
Fitment & Application:
| Brand | BD Diesel |
|---|---|
| Part Number | BDD-1030398 |
| Shipping Method | UPS/FedEx/USPS Ground |
| California Prop 65 Warning |
|

This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information, visit https://www.p65warnings.ca.gov/