Mike,
Thanks for the response. My Toyota mechanic has mentioned troubleshooting the solenoid, but I wouldn't let him based on how the truck is acting. By all appearances, the solenoid is doing its job. When the coolant reaches a particular operating temperature (I've been told...
My 1991 SR5 4WD has started running cool, which unfortunately prevents the automatic transmission from shifting into overdrive.
It is acting like the thermostat is stuck open. It takes a long time for the temp gauge to come out of full cold, when it used to take just minutes to fully warm up...
