"Pretty nice, and easy to install"
Cummins
Shop All
Quick Ship
Expert Pick
SKU #: ATS-3100052464
MPN #: 310-005-2464
ATS 3100052464 Thermal Bypass Valve Up-Grade With Billet Filter Coupler 19-24 Ram 6.7L Cummins
Description
When working properly, the 68RFE and Aisin AS69RC are a great transmission. Unfortunately, though, when things go bad, they go very bad. The 68RFE especially has been plagued with a high failure rate that many attribute to the fact the converter in this transmission never goes into a full lockup, which creates excessive heat, and we all know what heat does to a transmission. Interestingly enough, this easy to install bypass valve delete can keep your transmission temperatures in check in certain environments, potentially saving you a heap of money.
Another part that can be damaged by the heat allowed to pass through the factory bypass valve is the factory plastic filter coupler. To remedy this, ATS manufactures and includes a billet filter coupler so that the filter has a solid mounting point which won't be compromised by higher temperatores or over-tightening.
HOW IT WORKS: Ram decided to incorporate a transmission cooler bypass valve into the cooling system of the 68RFE and Aisin AS69RC that bypasses the transmission cooler during cold operation. The intent is to force the transmission to warm up faster. The reality is this bypass valve leaks and sticks in the bypass position in almost every case, causing the transmission cooler flow to bypass the trans cooler, essentially eliminating the trans cooler from the circuit. This causes severe damage to the transmission over time because it is not being adequately cooled by the transmission cooler. The ATS cooler block replaces the faulty design, eliminating the bypass valve and ensures 100% of the trans cooler flow is forced through the trans cooler. In every case this substantially reduces transmission temperatures.
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.
KIT CONTENTS:
- ATS Thermal Bypass
- Cooler Block Clamp Plate
- ATS 68RFE Billet Aluminum Filter Coupler
About ATS Diesel Performance
ATS DIESEL PERFORMANCE
ATS Diesel Performance, based out of Arvada, Colorado, is a diesel performance manufacturing company that designs, engineers, and manufactures upgraded transmission components, valve bodies, patented heavy-duty torque converters, exhaust and intake manifolds, electronics, turbochargers, dual CP3 injection pumps, and more for Cummins, Powerstroke, and Duramax powered diesel trucks. Operating out of a humongous 110,000 square foot facility in the heart of the Rocky Mountains allows ATS to keep operations in-house, as opposed to overseas sourcing, and then grueling test their products at altitude and through grades and descents that would make other companies think twice. From full-time RV users who travel nonstop to high-horsepower competition-based vehicles, ATS has the answers.
ATS DIESEL TRANSMISSIONSClint Cannon and Ranee Elder founded Automotive Transmission Specialists in 1993. At that time, the company specialized in transmission repair for all types of vehicles. In 1997, the company "Performance Torque Converters" was founded, and they started doing torque converter rebuilds in-house. Bringing the capability of building torque converters in-house gave them more flexibility to service their racing customers. As the popularity of diesel trucks grew and more people became aware of the power upgrades available for their diesels, problems with diesel transmissions emerged.
Clint started research and development into a more robust torque converter to address the transmission issues. It was discovered that a clutch pack design was the answer to providing a robust torque converter. The development of the TripleLok Torque Converter and the company's focus on Diesel Performance products resulted in a rename of the company to ATS Diesel Performance.
By having their foot in the door before most, it allowed ATS Diesels transmission upgrades to grow with the demands of diesel trucks, putting them at the forefront of reliability. Fortunately for us, Clint didn't stop with transmissions and began to explore and refine upgraded turbochargers, intake and exhaust manifolds, and anything else to generate additional power with the ever-present mindset of maintaining powertrain reliability.
ATS Diesel products are proudly made in the USA.
Blog
June 12, 2026
The diesel particulate filter (DPF) on your Cummins engine traps soot before it leaves the tailpipe. Over...
Read MoreCummins DPF Cleaning: Signs, Methods & Tips
June 12, 2026
P2509 flags when your Cummins ECM isn't seeing stable voltage coming from the battery and charging system....
Read MoreP2509 Cummins Code: Causes, Symptoms & Fixes
June 10, 2026
It starts small. Maybe the truck is a little slower to spool than usual. Maybe it sounds...
Read MoreHow to Find a Boost Leak Without Special Tools
June 05, 2026
Your exhaust system moves spent gases out of the engine and away from the cab. The muffler...
Read MoreResonator vs Muffler: Key Differences Explained
Overall rating: 4.5 / 5 from 16 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].
Review highlights
Reviews
Leaking immediately
"Started leaking right away. They also didn’t provide a bolt for the hold down bracket for the two lines. Waste of money"
It was easy to put
"It was easy to put on . Transmission runs about 25-28 degrees cooler,but the Problem is ,due to the thickness of the billet coupler I can not get it to tighten down properly, so I have a leaking line."
Thermal bypass
"Lowered transmission temperature by 20 degree (143 from 163) while not towing. Heavy towing (20k) temperature at 160 degree from 180. Aisin transmission Ram 4500, 4x4."
Product is great😊😊
"Product is great😊😊"
As expected
"As expected"
Keeps you running cool
"I paired this 68rfe thermal bypass with a stage 3 68rfe. I’ve put 15,000 miles in the new setup and I’ve never seen my transmission temp above 190*. Do yourself a favor with this cost-effective peace of mind."
‘24 68RFE
"Simple to install temperatures are cooler, failure point removed,very pleased"
ATS Thermal Bypass
"2019 4500 Aisin transmission temperature ran 163-170 towing 19,000 total GVRW. With thermal bypass transmission runs 140-150 with same load."
Great product but consistency leaks.
"Great product but consistency leaks. ATS is sending a new to replace so fingers crossed."
Q&A
- will replacing my current pem thermal by pass with ats void my warranty?
- That is a tough question to answer. For something like this, I would check with your local dealership to verify, as each dealer can vary.
- Does this void warranty?
- I would recommend contacting your dealer on the warranty. Ultimately it is up to them on what is submitted and what is not. -Sands