Transgo Allison 1000 Cut Back Valve.
Raise line pressure during lock up.
For 2004.5, 2005, 2006, 2007, 2008, 2009, 2010 GM 6.6L Duramax LLY LBZ LMM
Raise line pressure during lock up.This valve is the converter flow valve. This valve controls fluid to the converter clutch and cuts back pressure from 250 psi ( or so ) to 145 psi when the converter clutch applies. This valve will bring that pressure to a more acceptable 170-190 psi, and much more depending on application. This valve is very important in high horsepower applications to hold the most extreme conditions.
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Application: 2004.5-2010 Duramax