Product Details

Transgo cooler flow bypass delete kit for the GM 6L45, 6L50, 6L80, 6L90, 8L45, 8L90, and Alliston 1000 automatic transmission.

Product specifics:

• Brand: Transgo
• Part number: TRG-6L80-CLR-BYPASS
• Covered models: 6L45E, 6L50E, 6L80E, 6L90E, 8L45, 8L90, Allison 1000 (2017-2019).
• Makes: GM, Cadillac, Chevrolet, GMC
• Year range: 2014-up
• Country of origin: USA
• Transmission removal is not required.
• Genuine Transgo brand: YES

An easy, no-hassle cost-effective drop-in Cooler Flow Bypass Delete Kit for General Motors 6L80, 6L90, 8L90 and Allison transmissions.

Corrects, Prevents, Reduces:

• Provides all-time cooler flow regardless of temperature.
• Prevents overheating.
• Reduces transmission fluid temperature.
• Eliminates thermostatic assembly.
• Allows you to accurately check fluid level immediately after installation without having to wait or go through a warm-up cycle.

Includes:

• Cooler bypass plug
• O-ring for cooler bypass plug
• Pin
• Replacement O-ring for end cover
• Spacer

These transmissions can be found in the following vehicles; however, you should double check your application.  It is common for similar vehicles to have multiple transmission options available from the factory.

Cadillac

• ATS V6 2014-up
• CTS V6 2014-up
• Escalade, EXT, ESV 2014-2019

Chevrolet

• Camaro V8 naturally aspirated 2014-up
• Corvette 2007-2014-up
• Express Van 1500 2014-2017
• Silverado Truck 1500, 2500 2014-2021
• Suburban 1500 2014-2020
• Tahoe 2014-2020

GMC

• Savana Van 2500 2014-2017
• Sierra Truck 1500, 2500 2014-2021
• Yukon 2014-2020
• Yukon XL 1500 2014-2020
• Yukon Denali 2014-2015

These transmissions are part of the Turbo Hydramatic or Hydra-Matic series and also known by the following codes and part numbers: 6L45, 6L45E, 6L45-E, MYA, 6L50, 6L50E, 6L50-E, MYB, 6L80, 6L80E, 6L80-E, MYC, 6L90, 6L90E, 6L90-E, MYD, 8L90, 8L45, 8L90E, 8L45E, Allison 1000, T-1000, LCT-1000, T1000, Allison 2000, T-2000, LCT-2000, T2000, Allison 2400, T-2400, LCT-2400, and T2400.  

This transmission cooler flow bypass delete kit fits the following years: 2014, 2015, 2016, and 2017, 2018, 2019, 2020, and 2021.

Note on authenticity: Transgo has released a statement regarding the authenticity of some of the cheaper valve kits being sold on the internet. Not all are authentic. If it is too cheap to be true, it is probably not a true Transgo brand.