Hydraulic control Archives - Transmission Digest
GM Compensator-Feed System

There are a growing number of transmissions on the road that incorporate a hydraulic control feature many technicians are unfamiliar with, though they may have noticed the involved components during many builds. Variations of this system can be found in GM and ZF six-speeds, many Aisin AW units and some Ford models. If you haven’t already, it’s an easy bet you will encounter malfunctions related to it sooner or later.