December 09, 2013
Vehicles equipped with a U660E/F or U760E/F transmission may exhibit problems related to the B2 brake clutch. These include a delayed or harsh Reverse engagement, or a double bump when the B3 brake clutch applies before the B2 brake clutch.
These concerns can be traced to a worn and/or sticking B2 control valve and plug valve. Sonnax offers oversized B2 control valve kit 47740-35K, which renews valve function to restore normal Reverse operation.
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.
Vacuum tests at the ports indicated fail to hold the recommended minimum in-Hg.