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Upgrade your transmission cooling system with STL010, the Sure-Cool System for 6L80, 6L90, 8L80/90E, and 10L90 transmissions. Our cooler system provides full-time cooler flow, immediate cooler fill, and accurate fluid level check without warm-up cycle, making it a must-have for your Cadillac, Chevy, or GMC car or truck.
Designed for 2014-up models, this transmission cooling system upgrade is recommended during rebuild or routine transmission service as preventive maintenance. With STL010, you can expect overall transmission temperatures to run 20% cooler, reducing the risk of overheating and planetary damage, and increasing ATF life and leak protection.
Our system is easy to install into an existing, externally mounted cooler line block, and features a built-in safety bypass to ensure optimal performance. Experience reduced average operating temperatures by as much as 20%, and enjoy the peace of mind that comes with knowing your transmission is operating at its best.
Upgrade your transmission cooling system with STL010, and enjoy the benefits of immediate cooler fill, accurate fluid level check, and reduced risk of overheat while under load.
Blak
2025-07-26 13:11:23
Just put this in an works like a charm. Temp went from 180 plus to now barely breaking 160 150.cheap simple ez solution to what can become a big problem down the road
Billy Moore
2025-04-06 17:24:12
fast and super easy! hardest part was getting snap ring off.
Bill F
2025-02-28 11:20:36
Just what I needed to delete the thermal bypass for the transmission in my chevy truck. Zero literature w chinese writing all over the box. Thank goodness for youtube.
Matthew Perry
2025-02-25 09:43:33
The kit has nicely made pieces & fits excellently works as it should raises line pressure & stops poss overheat of trans. Stopped the bucking in my trans. I now sell them to every cust with that thermostat in the trans line when i do the trans service.
CWD
2025-02-12 16:04:19
This does work and it works especially well on the interstate. It keeps my transmission temps down between 128 and 142 degrees (depending on the ambient temperature) when driving at highway speeds. Also if you are just going for a short drive? Well it keeps the temps down to the 150s and also takes longer to heat up as you do drive. I will say this, a lot of people on here snf in online reviews are saying that this keeps their fluid temp down to 160 degrees. That's true to a point. If it's a warm day (70drgs f and above) and you are in stop and go traffic? I have seen the temps raise up to the low 180s. Keep in mind this is still a huge improvement. My 2017 Silverado tends to run 194 to 205 degrees in those same conditions depending on outside temperature and how hard I'm driving it. So this does work. But don't think you are going to drive in heavy traffic at a slow speed and it's gonna stay lower than 160 degrees. It's not. If you get on the throttle and or you are in stop and go? The temps will rise higher than that. But again that is still much better than previously. And on long road trips, when driving at highway speeds, with regular traffic? This works amazingly.
Stephanie L.
2025-02-07 20:04:05
Exactly what I needed for my Silverado. Great alternative to purchasing a whole new (and more expensive) aluminum housing replacement.
jason hampton
2024-12-07 15:03:23
Keeps transmission fluid 30-50 degrees cooler like they said it would.
Michael Maser
2024-11-26 12:05:59
Fit perfect !
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