I own a 2001 TacomaTRD with the 3.6L motor. Recently It has been experiencing some weird drivability issues. First off I have a P1135 code and I replaced my upstream O2 sensor, which didn't fix my light. And recently after that I had issues where my temperature gauge would rise time to time, got the thermostat replaced and didn't really fix problem. Now, when the temperature gauge rises while Im driving (30-40mph is about all I do around home) the transmission will seem as if it is in neutral (happens at same time as temp gauge jump) time to time. I even had the truck stall, and turn off on me after stopping in my neighborhood. I took it to mechanic and it did nothing while they drove it. I keep thinking it is my TCC solenoid but I dont know if that would cause the slip feeling at 30-40mph. 170,000 miles. I need some advice on what this could be and how to fix it.