Valve body repair
Valve Bodies, Solenoids and Hydraulic System Testing
Technical guides on valve body repair, hydraulic control circuits, solenoids, separator plates, valves, bores, wear points, testing procedures, rebuilding methods, and related replacement parts. This section is designed for transmission rebuilders, valve body specialists, repair shops, suppliers, and parts professionals working with automatic transmission hydraulic control systems.
In our last article we talked about transmission solenoid frequency and how it relates to the mechanical response of a solenoid when Pulse
Width Modulation (PWM) is used to control a solenoid. We discussed some of the
theory, but what does this look like with an actual solenoid? How does
frequency affect the response of a solenoid and how critical is matching the
OEM frequency when driving a solenoid, especially when we start talking about
testing and reclaiming solenoids.