The Subaru mystery burn
The Subaru TR580 transmission is known for having torque converter clutch solenoid failures. An example of this can be seen in Figures 1 (above) and 2 (below). The solenoid resistance should be between 10 to 13.5 ohms. The resistance right at the solenoid itself on the valve body is close to 38 ohms. And as
Sonnax releases Subaru TR580 boost valve kit
Sonnax has released a new drop-in TCC boost valve kit for Subaru TR580 transmissions. Sonnax says users can restore hydraulic integrity to the TCC circuit with tightly controlled tolerances in these transmissions by installing this kit (part no. 823740-12K). This kit includes a steel valve that combats premature wear and wear-resistant sleeves, the company says.
