WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket

Excellent product. Did exactly what it was purchased for.

Easy to install by yourself Transmission temperature used to be at 130 C in a 30 minute mountain pass in 20 C weather. Now its 100 C in the same mountain pass and 30 C weather. Also, transmission temperature will go back to 85 C after 20 minutes of normal driving.

Pulling a 6000# trailer with my 1500, tends to make the transmission fluid run hot, especially with a stock transmission cooler thermostat that doesn’t open until 194°. Was recommended this product to lower the temp and make my new transmission last for years. Watched several videos and people were saying it takes 10-30 minutes for this install. I’m currently in a cast, and considered it a challenge! It did take me closer to the 30 min mark, but was super easy to do, even 1 handed. Temps dropped 40-50° at highway speeds and 20-40° for city driving (in 94° summer heat). Will see how well it works this weekend while pulling our camper. Fantastic product, just wish I would have known about it years ago - could have saved my factory transmission and $5k to replace it!

Easy to install, as per the instruction. Before, my transmission temperature was averaging ~80°C with the stock GM set up. Now with the STL010 mod, my transmission temperature hasn't gone past 60°C.

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