The RevMax 68RFE Transmission Cooler Thermostatic Bypass Upgrade is a performance-focused transmission cooling upgrade designed for Dodge Ram trucks equipped with the 6.7L Cummins engine and 68RFE or AS69RC transmission. Built from billet 6061 aluminum, this direct bolt-in module replaces the restrictive factory thermal bypass valve to improve transmission cooler flow and reduce operating temperatures. Designed for towing, heavy-duty use, and long-term transmission reliability, this upgrade helps eliminate one of the common factory cooling restrictions found in Cummins-equipped trucks.
Key Features
ZeroStat Technology: Eliminates the restrictive factory thermal bypass system for unrestricted cooler flow from startup. 87% Improved Cooler Flow: Significantly increases transmission fluid circulation to improve cooling performance. Billet 6061 Aluminum Construction: Precision-machined billet housing provides superior durability and long-term reliability. Integrated Cooling Fins: Passive cooling fins help dissipate additional heat directly from the module. Direct Bolt-In Installation: No cutting, fabrication, or modifications required. Improved Transmission Longevity: Helps reduce excessive transmission heat that contributes to wear and failure. Easier Transmission Maintenance: Allows cooler line flushing without requiring heated fluid machines.
Benefits / Why Choose This Product
The RevMax bypass upgrade improves cooling efficiency and transmission reliability. With this upgrade, you can:
Reduce transmission temperatures faster
Improve towing reliability
Eliminate factory thermal valve failure points
Increase cooler flow significantly
Simplify transmission maintenance and flushing
It’s one of the most popular reliability upgrades for Cummins-equipped Ram trucks.
Who Is This Product For
This product is ideal for:
Ram 2500 and 3500 owners
Cummins diesel truck owners
Heavy towing applications
Off-road and performance truck builds
Transmission reliability upgrades
Diesel enthusiasts seeking lower temps
Who Should NOT Buy This
This product may not be suitable for:
Non-Cummins vehicles
Trucks outside supported transmission years
Owners wanting factory-original cooling systems
Light-duty drivers with no towing or heavy-load use
Use Cases
The RevMax upgrade is perfect for:
Heavy towing
Hot climate driving
Transmission overheating prevention
Transmission rebuild protection
Performance diesel truck setups
Long-haul hauling applications
Specifications
Feature
Details
Product Type
Transmission cooler bypass upgrade
Material
Billet 6061 aluminum
Cooling Technology
ZeroStat unrestricted flow
Cooler Flow Increase
Approx. 87%
Installation
Direct bolt-in
Cooling Fins
Integrated
Compatibility
68RFE & AS69RC transmissions
Compatibility
The RevMax 68RFE Transmission Cooler Thermostatic Bypass Upgrade is compatible with:
Dodge Ram 2500
Dodge Ram 3500
6.7L Cummins diesel engines
68RFE transmissions
AS69RC transmissions
Model years 2013–2018
Setup / How to Use
Basic installation steps:
Remove factory cooler bypass module
Install RevMax billet module
Replace supplied O-rings and clips
Reconnect cooler lines
Verify proper transmission fluid circulation
Professional installation is recommended for best results.
Comparison Section
RevMax Upgrade vs Factory Thermal Bypass Valve
RevMax: Full cooler flow immediately at startup
Factory Valve: Restricted flow until warm-up
RevMax Upgrade vs Stock Cooling System
RevMax: Better cooling efficiency and reliability
Stock System: Higher restriction and possible valve failure
Best Choice
Choose RevMax for improved cooling and towing reliability
Choose stock system for factory-original configuration
What’s in the Box
RevMax Billet Cooler Bypass Module
O-rings and retaining clips
Installation instructions
FAQs
Is the RevMax 68RFE Transmission Cooler Bypass Upgrade worth buying? Yes, it is worth buying for improved transmission cooling and reliability.
Who is this RevMax upgrade best suited for? It is ideal for Cummins truck owners who tow or operate under heavy loads.
Is installation beginner-friendly? Yes, it is a direct bolt-in replacement with no modifications required.
What are the key benefits of the RevMax bypass upgrade? The upgrade improves cooler flow, lowers transmission temperatures, and enhances reliability.
How does the RevMax upgrade compare to the factory bypass valve? The RevMax module eliminates flow restriction found in the factory valve.
Does this upgrade help prevent overheating? Yes, unrestricted cooler flow helps reduce transmission heat buildup.
Can cooler lines be flushed more easily after installation? Yes, the system allows flushing with room-temperature fluid.
What vehicles is this compatible with? It fits 2013–2018 Ram 2500 and 3500 trucks with 6.7L Cummins engines.
What’s included in the box? The package includes the billet bypass module, hardware, and instructions.
Does this upgrade include cooling fins? Yes, integrated fins provide passive heat dissipation.
Is the RevMax upgrade better than stock? Yes, it improves flow, cooling efficiency, and long-term reliability.
What are the best alternatives to the RevMax bypass module? Alternatives include other billet bypass upgrades and aftermarket transmission cooling systems.
Conclusion
The RevMax 68RFE Transmission Cooler Thermostatic Bypass Upgrade is a smart reliability upgrade for Cummins truck owners who want improved transmission cooling and long-term durability. With unrestricted cooler flow, billet aluminum construction, and simple bolt-in installation, it helps address one of the most common factory cooling limitations found in the 68RFE platform. If you tow heavy, drive in hot climates, or simply want better transmission protection, this upgrade is an excellent addition to your diesel truck.
