9-7X V8-5.3L (2005)
Components of the two designs may not be intermixed, although the single spring and valve design can be substituted for the early valve and two-spring
design (View 2). This change simplifies the assembly process and eliminates the possibility of the springs becoming bound or bent in the valve bore as
well as reduces material cost.
Reverse Boost Valve and Bushing Design Change
Effective March 7, 2005, the pump cover (215) now uses a more compact reverse boost valve (219) and reverse boost bushing (220) (View 1). This
design change is necessary in order to create an area for the new input speed sensor (ISS) assembly which will be first introduced in some 2006 M30 and
M70 transmission models.
The compact design works the same as the previous design but the two designs cannot be interchanged. This is because the snap ring groove location has
