BD Diesel Thermostat Bypass

2013–2018 Ram 2500 / 3500 6.7L Diesel, 2014–2018 Ram 3500 6.4L 392, 2014–2018 Ram 2500 / 3500 5.7L Hemi

Part #: 1061528

Overview

The BD Diesel Thermostat Bypass is a critical upgrade designed to enhance the reliability of your Ram 2500 or 3500’s transmission cooling system. Stock cooler bypass valves are prone to jamming due to debris buildup, which can trap the valve in recirculation mode. This malfunction causes transmission temperatures to rise, increasing the risk of overheating and premature transmission failure. The BD Diesel Thermostat Bypass eliminates this weak point by removing the failure-prone valve and ensuring the transmission cooler remains operational at all times.

Ideal for owners of 2013–2018 Ram 2500 and 3500 models equipped with 6.7L Cummins diesel, 6.4L HEMI, or 5.7L HEMI engines, this bypass kit provides peace of mind and improved transmission durability under demanding conditions.

Key Features

Engineered to maintain optimal transmission temperatures and prevent costly failures, the BD Diesel Thermostat Bypass offers the following benefits:

• Eliminates the stock cooler bypass valve, a common failure point prone to jamming from debris
• Ensures continuous operation of the transmission cooler for consistent temperature control
• Reduces risk of transmission overheating and premature wear
• Compatible with multiple Ram 2500 and 3500 models from 2013 to 2018
• Simple, direct-fit design for straightforward installation
• Durable construction built to withstand harsh operating environments
• Maintains factory cooling system efficiency without modification
• Supports both diesel and gasoline engine variants including 6.7L Cummins, 6.4L 392 HEMI, and 5.7L HEMI

Construction & Design

The BD Diesel Thermostat Bypass is crafted from high-quality materials engineered to endure the rigors of heavy-duty use. Its robust design replaces the stock bypass valve with a reliable, maintenance-free solution that prevents valve sticking and ensures uninterrupted coolant flow through the transmission cooler. Precision engineering guarantees a perfect fit with factory components, preserving the integrity of the cooling system while enhancing its reliability.

Installation & Fitment

Installation of the BD Diesel Thermostat Bypass is straightforward and designed for direct replacement on compatible Ram 2500 and 3500 models. No extensive modifications or special tools are required, making it accessible for professional technicians and experienced DIY enthusiasts alike. This bypass kit fits the following vehicles:

• 2013–2018 Ram 2500 6.7L Diesel
• 2013–2018 Ram 3500 6.7L Diesel
• 2014–2018 Ram 3500 6.4L 392 HEMI
• 2014–2018 Ram 2500 5.7L HEMI
• 2014–2018 Ram 3500 5.7L HEMI

What's Included

• BD Diesel Thermostat Bypass assembly
• Installation hardware and fittings
• Detailed installation instructions

Ideal For

This product is ideal for Ram 2500 and 3500 owners who demand reliable transmission cooling performance, especially those who tow heavy loads, operate in extreme temperatures, or seek to prevent costly transmission repairs. It is also well-suited for fleet operators and diesel enthusiasts looking to enhance the durability of their trucks’ cooling systems.

BD Diesel Performance designs and manufactures diesel performance parts aimed at stronger power delivery, improved reliability, and heavy-duty capability. Their lineup spans turbo and fueling upgrades, manifolds, intercoolers, and other supporting components—built for Cummins, Power Stroke, and Duramax owners who want more torque for towing, work, or competition.