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Why you need an ATS Thermal Bypass Valve Up-Grade
The ATS Thermal Bypass Valve Upgrade with Billet Filter Coupler is a must-have for any truck with a 68-RFE or Aisin AS69RC transmission. It replaces the faulty bypass valve design, ensuring 100% of the transmission cooler flow is routed through the cooler, significantly reducing transmission temperatures and extending transmission life. Featuring a durable billet aluminum filter coupler and clamp plate, this upgrade prevents costly transmission damage caused by overheating and severe wear over time. The complete installation kit includes the ATS Thermal Bypass, cooler block, billet filter coupler, and coupler o-rings for a straightforward, reliable installation. It ensures optimal cooling efficiency in all conditions without compromising warm-up times, backed by ATS Diesel Performance's innovative and durable diesel solutions.
Authentic ATS Diesel Performance Product
- Anodized Billet Aluminum
- Billet Filter Clamp Plate
Standout features of the ATS Thermal Bypass
Why you need a thermal bypass
The ATS Thermal Bypass is the Original design to eliminate the transmission thermostat, which offers 100% flow & cooling. OE thermostats require a temperature threshold which then allows trans fluid to flow through the coolers. If that wasn't bad enough, over time the thermostats can decay and stick closed resulting in failures due to transmission fluid over heating.
- Constructed of premium Billet Aluminum
- Allows 100% continuous flow
- Lower Transmission Temperatures
- BIllet Filter Coupler Included
- Authentic ATS Diesel Performance Product
Garry Lamb
2025-08-27 15:38:31
I’ve been running this product for several thousand miles now on my 2022 ram 2500 6.7 with the 68rfe transmission. On hot days I’m seeing temps around 150 as opposed to the 170 mark my truck used to run at. I haven’t had a chance to tow my camper with it installed yet but I’m sure it will do great.
armles71
2025-07-20 14:13:26
easy install, lil messy, well worth it
hector
2025-06-01 15:13:23
I had ordered this bypass kit a few months ago and just a few days ago I was able to take the time to installAfter reviewing the kit I was supposed to get the valve and the other parts posted on the picture however I never received the O-RingsI was able to get it to work on my truck
Customer
2025-05-21 12:26:10
Normal every day traffic and driving, my 68RFE in my 2022 2500. The trans temp runs about 35 degrees cooler. Big difference. I love this thing.
Stephania Dejno
2025-02-07 17:54:33
O-rings that come with this kit suck all it does is leak the whole time quality is horrible
Juddster
2024-12-19 17:04:42
Quick shippingPackage was great quick easy install
Piedmont SC
2024-11-19 15:55:40
ATS installed easily on Ram 2020 3500 6.7L Cummins with Aisin transmission. ATS is full flow with open connections for transmission fluid to cooler. Dropped transmission temperature by 10F from what I can tell initially. Should be helpful later when pulling heavy loads in hotter weather like summer vacations with the 5th wheel. I also found my transmission pan had a drain plug, so I was able to do transmission fluid change while installing ATS thermal bypass. Fluid change is needed by 30,000 miles. I'm only at 23,000 miles now but changed the fluid anyway. Mobil 3309 fluid from Amazon works great for the change.
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