Any other Toyota techs ever encounter a defective or perforated oil strainer (Toyota part # 32804-23330-71) inside the transmission control valve?
One of our trucks was pushed to the shop with a complaint of "Transmission does not work".
Trans would not operate in Forward or Reverse and pressure checks showed 165 PSI at the Main but 0 PSI at the clutch port.
Air pressure to the clutch ports with valve body removed showed clutches to be intact.
Tear down of the valve body revealed a stuck safety valve (Toyota part 32732-23330-71) and a stuck change valve (32735-23330-71). Both were bound up by debris and showed slight scratching. When I separated the valve body sections I discovered a 5mm sized section of the oil strainer missing completely.
I am just wondering if anybody else has ever found one of these strainers to be defective. I can't see any reason for this to happen unless it just vibrates and shakes a hole in the mesh or if it happens because of hydraulic "flow hammering" pulses.
Comments requested.