Cummins
Shop All
SKU #: REVM-68RFE-929AA
MPN #: 68RFE-929AA
RevMax Transmission Thermostat Cooler Bypass 13-18 Ram 6.7L Cummins
Description
Are you frustrated with your Cummins transmission running hot? The 68RFE and As69-equipped Ram trucks have always been known to run hotter than their early predecessors. There have also been numerous melted-down transmissions due to the bypass valve sticking in the cold-closed position. Lastly, the thermal bypass has a significant restriction, reducing cooler flow by 87% No other bypass offers the full, unrestricted flow that the RevMax version does.
The completely re-engineered, Billet 6061 Aluminum RevMax Cooler Thermostatic Bypass Upgrade completely fixes all these complaints. Utilizing their ZeroStat Technology, they completely removed the orifice restriction, ensuring full cooler flow at all times. This equates to lower operating temperatures and longer transmission life.
Enter your zip and we'll see if installation is available.
- Request quotes from local installers at checkout
- Compare options and choose the best fit for your install
About WrenchConnected
WrenchConnected is an independent installation marketplace operating in partnership with Diesel Power Products.
How it works
After checkout, we route your vehicle info and part SKU to verified installation shops near you. Local installers review the job and submit competitive bids; you pick the shop you want based on price, reviews, and availability. Your name and email stay private until you select an installer.
Pricing
You pay for the bid from your preferred shop. The full amount is shown before you confirm — installers cannot add charges without your written consent. Payments are processed securely by Stripe.
Your privacy
During bidding, shops see only your service ZIP code, vehicle year/make/model, and the part SKU — not your name, email, or address. Only the shop you select receives your contact details after payment. We never sell your personal information.
More detail at wrenchconnected.com.
FEATURES & BENEFITS:
- RevMax ZeroStat Patented Technology 87% increase in cooler flow due to the elimination of the orifice bottleneck located in the factory part
- There is no longer a thermal-controlled bypass valve that can fail, causing a lack of cooler flow and complete transmission destruction
- Instead of closing off cooler flow when the transmission is cold and forcing it to generate unneeded heat, their bypass allows your cooler to immediately begin cooling your transmission, without waiting for it to get hot, just to try to cool it later
- You cannot properly flush your cooler lines without the aid of a hot-flush machine that can heat up enough to open the bypass valve. With our bypass upgrade, you can use room-temperature fluid to clean out your cooler at any time, without any special tools
- Integral aluminum cooling fins aid passive cooling of the block and the fluid
About RevMax Converters
RevMax Performance Torque Converters Precision Engineering for Every Drive
When it comes to torque converters, RevMax Performance stands above the rest, delivering custom-engineered solutions for any application. From heavy-duty Allison-equipped trucks to race cars and family sedans, RevMax Performance Torque Converters are built to elevate your vehicles performance with unmatched quality and craftsmanship.
What sets RevMax apart? Every torque converter is custom-built to your exact specifications, ensuring optimal performance tailored to your unique needs. Unlike mass-produced options, our converters are meticulously crafted by a team of experienced professionals using only the highest quality materials, including 4340 hardened steel and 4130 Chrome-moly. With components sourced exclusively from U.S. distributors, every product is proudly Made in the USA and rigorously inspected to exceed the highest standards. By relying on word-of-mouth endorsements and customer satisfaction, RevMax lets the performance of it's products speak for itself, delivering exceptional value without compromising on quality. From precision robotic welding and computerized balancing to high-heat enamel finishes and secure shipping, every step in the manufacturing process is designed for excellence. When you choose RevMax, you're investing in durability, efficiency, and the confidence that your truck is equipped with the best.
Experience the RevMax difference, where innovation meets performance, and quality drives every mile.
When it comes to torque converters, RevMax Performance stands above the rest, delivering custom-engineered solutions for any application. From heavy-duty Allison-equipped trucks to race cars and family sedans, RevMax Performance Torque Converters are built to elevate your vehicles performance with unmatched quality and craftsmanship.
What sets RevMax apart? Every torque converter is custom-built to your exact specifications, ensuring optimal performance tailored to your unique needs. Unlike mass-produced options, our converters are meticulously crafted by a team of experienced professionals using only the highest quality materials, including 4340 hardened steel and 4130 Chrome-moly. With components sourced exclusively from U.S. distributors, every product is proudly Made in the USA and rigorously inspected to exceed the highest standards. By relying on word-of-mouth endorsements and customer satisfaction, RevMax lets the performance of it's products speak for itself, delivering exceptional value without compromising on quality. From precision robotic welding and computerized balancing to high-heat enamel finishes and secure shipping, every step in the manufacturing process is designed for excellence. When you choose RevMax, you're investing in durability, efficiency, and the confidence that your truck is equipped with the best.
Experience the RevMax difference, where innovation meets performance, and quality drives every mile.
Blog
June 03, 2026
The 1st gen Cummins ran from 1989 to 1993. Dodge put the 5.9L 12-valve inline-six into the...
Read More1st Gen Cummins Pros and Cons
June 02, 2026
Your 5.9 Cummins will tell you the lift pump is starting to go before it stops working...
Read More5.9L Cummins Lift Pump Failure Symptoms Guide
May 07, 2026
If you own a 2003–2007 Ford Super Duty with the 6.0 Powerstroke, the oil cooler is one...
Read MoreBest Oil Cooler for 6.0 Powerstroke (Top Picks Guide)
April 28, 2026
A lift pump is one of those diesel upgrades that doesn’t always get much attention, but it...
Read MoreShould You Install a Lift Pump?