Product Details

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Transgo Clutch Select Valve and TCC regulator valve kit for the GM 6L80 and 6L90 automatic transmission.

Product specifics:

• Brand: Transgo
• Part number: 6L8-CS-TCC
• Covered models: 6L45E, 6L50E, 6L80E, 6L90E
• Makes: GM, BMW, Buick, Cadillac, Chevrolet, GMC, Hummer, and Pontiac
• Year range: 2006-up
• Country of origin: USA
• Transmission removal is not required.
• Genuine Transgo brand: YES

In 2006 and later General Motors and BMW vehicles equipped with 6L45, 6L50, 6L80 and 6L90 automatic transmissions often have complaints of lock-up cycling or a surging sensation, as well as shift solenoid or TFP performance codes due to sticking clutch select valves.

The lock up cycling complaint is often due to the poor resolution, or accuracy of the original equipment TCC regulator valve and spring in relation to the TCC solenoid function. The torque converter clutch regulator valve function is to regulate the torque converter clutch apply pressure. The computer varies the pulse width modulation of the TCC solenoid to control the slip speed of the lock-up clutch. The OE design valve and spring calibration does not provide adequate resolution under all driving conditions which leads to the TCC slip cycling.  The new design TCC regulator valve and spring provides a higher degree of accuracy in controlling the slip speed, especially at lower road speeds. The difference in drivability is quite remarkable.

The clutch select valves direct fluid to various clutch elements depending on the shift solenoid command status. The OE select valves are prone to sticking or dragging in their bore. When one of the clutch select valves sticks or drags, the computer sets a solenoid performance or TFP switch code. The computer assumes that the solenoid did not function correctly as the computer has no way to determine if the solenoid, clutch select valve or the TFP switch malfunctioned. The solenoid performance and TFP codes are very misleading. Quite often, the real problem is the clutch select valve sticking in the bore. Sticking or dragging clutch select valves often lead to unnecessary solenoid replacement.

Features and benefits:

The TransGo drop-in redesign USA-made hardened steel TCC regulator valve, features longer lands which restores the hydraulic integrity of the circuit by utilizing previously unused and therefore unworn areas of their bore. In addition, the special design valve and spring calibration enables the computer to control the TCC regulation more accurately, which results in better slip control. Lastly, the drop-in USA-made hardened steel clutch select valves greatly help prevent the valves from sticking in their bores.

Corrects, Prevents, and Reduces:

• Shift solenoid performance codes or false P0751 due to sticking or dragging clutch select valves.
• Low speed TCC surge
• TCC cycling during cylinder deactivation.
• Extends converter clutch lining durability.

Kit Includes:

• Precision USA-made hardened steel TCC regulator valve
• TCC regulator valve calibration spring
• (2) USA-made hardened steel clutch selects valves
• (2) Clutch select valve springs for units with updated OEM separator plate

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.

BMW (18 bolt transmission pan)

• 116i, 118i, 120i, 125i, 128i, 130i 2007-2012
• 316i, 318i, 320i, 323i, 325i, 325xi, 328i, 328xi, 330i, 330xi 2007-2009
• X3 2.5si, 3.0i, 3.0si 2007-2011

Buick

• Electra 2010-2011
• Park Avenue 2010-2011

Cadillac

• ATS 4cyl 2012-2013
• ATS V6 2012-up
• CTS 2.8L 2007
• CTS 6.0L 2007-2009
• CTS V6 2007-up
• Escalade, EXT, ESV 2007-2015
• SRX Wagon 2007-2009
• STS 2007-2012
• STS-V V8 Supercharged 2006-2011
• XLR 2006-2009

Chevrolet

• Avalanche 1500 2009-2012
• Camaro V8 naturally aspirated 2009-2015
• Caprice 2009-2013
• Colorado 5.3L 2008-2012
• Corvette 2007-2014
• Express Van 1500 2009-2017
• Silverado Truck 1500, 2500 2008-2021
• Suburban 1500 2009-2020
• Tahoe 2009-2020

GMC

• Canyon 5.3L 2008-2012
• Savana Van 2500 2009-2017
• Sierra Truck 1500, 2500 2008-2021
• Yukon 2009-2020
• Yukon XL 1500 2009-2020
• Yukon Denali 2007-2015

Hummer

• H2 2008-2010
• H3 5.3L 2008-2011

Pontiac

• G8 V8 2008-2010

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.

This transmission shift and torque converter clutch kit fits the following years: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 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.