Thermal Bypass Valve Up-Grade

Features:

• Billet aluminum thermal bypass block upgrade
• Eliminates failure prone factory thermostat
• Ensures constant transmission fluid flow
• Prevents overheating and transmission damage
• Improves transmission cooling efficiency
• Direct replacement for OEM bypass block
• Fits 68RFE and Aisin transmissions
• CNC machined for precise fitment
• Anodized finish resists corrosion
• Includes new O rings for sealing
• Engraved flow directions simplify installation
• Ideal for towing and heavy duty use

Stop Transmission Failures Before They Start

If you have ever worried about transmission temps climbing when you are towing or working your truck hard, this ATS Thermal Bypass Block upgrade is one of those upgrades that just makes sense. The factory bypass valve is a known weak point, and when it sticks, it can send hot fluid right back into the transmission instead of through the cooler. That is the kind of issue that can lead to expensive repairs before you even know what went wrong. This billet upgrade removes that risk completely by allowing constant fluid flow through the cooling system at all times. Additionally, it gives you peace of mind when hauling heavy loads or driving in hot conditions, where heat management really matters. It is a simple upgrade, but it directly protects one of the most expensive components in your truck. Once installed, you can focus on the job instead of watching your transmission temps.

Precision Machined Cooling Solution For Reliable Fluid Control

The ATS 310-005-2356 Thermal Bypass Block is engineered as a direct replacement for the factory unit found in the OEM 52014523AB assembly on 2010-2012 RAM 6.7L Cummins trucks. Instead of relying on a thermostat controlled valve that can fail, this design uses a solid billet aluminum block to maintain unrestricted transmission fluid flow at all times. This ensures that fluid is consistently routed through both factory coolers, improving thermal stability and protecting internal transmission components. Furthermore, the CNC machined construction provides a precise fit while the anodized finish adds corrosion resistance for long term durability. The unit includes engraved flow markings, making installation straightforward and reducing the chance of errors during setup. New O rings are also included to ensure a proper seal and prevent leaks once installed. Designed to work with both 68RFE and Aisin transmissions, this upgrade delivers a dependable solution for maintaining safe operating temperatures under demanding conditions.

Fitment: 2010, 2011, 2012 Dodge RAM 2500/3500 6.7L Cummins

Notes:

• Fits only trucks with factory bypass block
• Requires AHQ or NHT cooling package
• Verify presence of secondary transmission cooler
• Check for serviceable block near fuel filter
• Not needed on all 6.7L Cummins trucks
• Replaces OEM assembly 52014523AB component
• Designed for 68RFE and Aisin transmissions
• Fixes known factory thermostat failure issue
• Ideal for towing and heavy load conditions
• Helps prevent costly transmission repairs
• Simple upgrade with major reliability benefits
• Best for heat management under load

Install Instructions