Greetings,
Recently driving home at 55mph heard "Ziinngg noise" and revs shoot up-pulled over and was able to go forward at 20mph@2700 rpm with no upshift"limp mode" and CEL on-got home and ran codes and got PO743 along with several random misfire codes PO306 etc. From all research points to TCC solenoid or relay. Anyway to test relay(i have ohmmeter, but am not that knowledgable on testing ,so a walk-thru would help.