I have an Acura CL type S with a rebuilt transmission from 10,000 miles ago. It is a 2001 model. The torque converter went out a 8,000 since rebuild and has been rebuilt again. The symptoms are as follows. When shifting into overdrive and transmission is cold, it shifts out of overdrive into I believe 5th which at 70mph it goes from 2,000 rpm's to 3,000 rpms and back n forth. It doesn't do it too often once Transmission is warm. Now the symptoms of this transmission were the same before torque converter went out, and the same now that they rebuilt it again. Its unreal. It is under warranty but the transmission guy's are stumped and I don't have tons of time to take it back. I tested the throttle position sensor thinking it might be that, but it's all good. Any takers? Is there any sensors that control whether it shifts in and out of overdrive when its colder. I'm out of answers here guys.