Product Details

Transgo 8L90-SHUTTLE-OES drop in style pressure regulator shuttle valve assembly for the GM 8L45 and 8L90 automatic transmission.

Product specifics:

• Brand: Transgo
• Part number: 8L90-SHUTTLE-OES
• Covered models: 8L45, 8L45E, M5N, 8L90, 8L90E, M5U, 8 speed automatics.
• Makes: GM, Cadillac, Chevrolet, GMC
• Year range: 2015-up
• Country of origin: USA
• Genuine Transgo brand: YES
• Transmission removal is not required.

This Transgo pressure regulator (PR) shuttle valve assembly is an easy, drop-in solution for a common wear location on 8L45 and 8L90 automatic transmissions.

Corrects, Prevents, Reduces:

• High line pressure
• Unstable line pressure
• Broken parts
• Loss of converter feed
• Low cooler flow

Kit Includes:

• USA-made hardened steel valve
• USA-made 6160 aluminum sleeve

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

• Escalade, EXT, ESV

Chevrolet

• Camaro
• Colorado 5.3L
• Corvette
• Express Van 2500
• Silverado Truck 1500, 2500
• Suburban
• Tahoe

GMC

• Canyon 5.3L
• Savana Van 2500
• Sierra Truck 1500, 2500
• Yukon
• Yukon XL 1500
• Yukon Denali

These transmissions are part of the Turbo Hydramatic or Hydra-Matic series and known by the following codes and part numbers: 8L45, 8L45E, M5N, 8L90, 8L90E, M5U.

This transmission master rebuild kit fits the following years: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022.

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.