Have a 2012 hilux dual cab, 4 speed automatic. Have just recently purchased the car and have just done some long distance driving. About 20 mins into the trip was sitting on 130km( speed limit in the nt) and about 2500rpms travelling nicely along a flat bit of highway when the rpms went up to 3500rpms and if I went faster the rpms would continue to rise until almost redlining. If I slowed down it would go back a gear and rpms would come down but as soon as a I sped up the rpms would shoot up to 3500rpms or high. This problem would only stop if i came to stop turned the car off and and then started ag ain but after about 20mins it would start again.
Anyone have any suggestions on what the problem would be or where to start looking.
Cheers micheal