Ok I am having an issue with the overdrive in my 2001 Dakota R/T. I am driving on the highway at around 65 mph and about 15 minutes in my rpm goes up 200-300 and the speed is the same. Is it the lock up in the converter or a solenoid in the tranny. It has been the same for about 3 months and is not getting worse. The transmission has about 90,000 miles since being rebuilt and a new 3ooo stall converter from SMR
Any help please