Superior SureCool System Upgrade for 6L80/6L90 8L80/8L90 2014-Up

Genuine Superior SureCool System Upgrade for 6L80/6L90 and 8L80/8L90 transmissions (2014-Up).

This patented active cooler flow bypass kit replaces the factory thermal bypass valve that can stick closed and restrict flow to the cooler. The SureCool system delivers full-time cooler flow and lubrication so your transmission stays protected under all conditions – towing, heavy traffic, hot climates, or daily driving.

Fits all 2014-up GM 6L45/50, 6L80/90 and 2015-up 8L45/50, 8L80/90 (including 8L80 Euro/Import models) plus 2017-2019 L5P Allison applications with the external aluminum thermal bypass block on the driver side. Re-uses your existing GM block, lines, and hardware – simple drop-in upgrade during any service or rebuild.

Key advantages include a built-in safety bypass that protects the transmission if the cooler or lines ever become restricted, immediate cooler fill on startup, and the ability to check fluid level accurately without a full warm-up cycle. Drivers report significantly lower operating temperatures and noticeably smoother, more reliable performance.

• Built-in safety bypass
• Immediate cooler fill
• Immediate accurate fluid level check without warm-up cycle
• Reduced average operating temperatures by as much as 30 percent
• Reduced risk of overheat while under load
• Increased ATF life

Made in the USA. Accept no substitutes! Keep your GM transmission SureCool!