October 16, 2014
The boost sleeve in listed units wears from repeated oscillation of the boost valve, allowing Reverse pressure to exhaust. This will result in delayed Reverse, low line pressure in Reverse and/or burnt K3 and B2 brake clutches. Sonnax boost valve kit 15741-51K eliminates these concerns and restores proper hydraulic control.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
A vacuum test at the port indicated fails to hold at least 18 in-Hg.