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.
Debris in the stock cooler bypass valve can cause it to jam the internal valve, keeping it in recirculation mode. When this happens, the Tranmission temperature will rise, which can lead to overheating and premature Tranmission failure.
The BD Cooler Bypass Delete keeps the Tranmission cooler operational all the time and eliminates this failure-prone item.
Install Time:
- 1 Hour
Warranty:
Parts
- 12-Months
- 24,000 Miles
Note:
Replaces OEM Part #23413140
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:
- Eliminates factory bypass valve
- Ensures 100 percent fluid flow through the Tranmission cooler
- Keeps your Tranmission temperature as low as possible
- Includes all new seals required for install
- Not just a plug, includes a whole replacement block
Installation Notes:
Professional installation is required.
Specifications:
EMS Code: 4.
Installation Time: 1 Hour.
Transmission Model: Allison.
Warranty: 12-Months/24,000 Miles.
Fitment & Application:
| Brand | BD Diesel |
|---|---|
| Part Number | BDD-1061532 |
| 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/