6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket

Sure Cool System with Bypass Gasket for 6L80 6L90 8L90

This sure cool system with bypass gasket regulates transmission fluid temperature to prevent overheating, referencing model number STL010.

Overview

This sure cool system with bypass gasket allows for lower overall transmission operating temperatures by altering the fluid flow path. Designed to prevent fluid overheating, this sure cool system with bypass gasket protects critical internal transmission components from premature wear. It is a vital choice for heavy-duty truck owners and performance drivers looking to extend transmission service life.

Built For Performance

• Enables immediate cooler flow to lower operating temperatures during high-stress use.
• Constructed from high-grade aluminum for robust durability and heat transfer.
• Bypass valve design prevents excessive fluid pressure during cold starts.
• Includes necessary gaskets and hardware for a complete installation.

Fits These Machines

• for 6L80 Transmissions
• for 6L90 Transmissions
• for 8L90 Transmissions

On-The-Job Use

• Preventing transmission fluid overheating during heavy towing or hauling.
• Improving shifting consistency in hot weather conditions.
• Extending transmission lifespan by maintaining stable operating temperatures.

Specs At A Glance

Good To Know

Q: Does this modification require electronic tuning? A: No, this is a purely mechanical bypass system that works automatically without any software updates.

Q: Can this be installed without removing the transmission? A: Yes, it is designed for installation on the exterior cooler line manifold of the transmission housing.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.