Hey all, first time on the forums here. I Have experienced this problem where I will be driving and after about 20-30 minutes at highway speeds (65-70mph) the transmission starts to rev pretty high. I'm talking at 70mph it'll hit close to 5K rpm, on a flat road. The engine will also start to make a whining sound. I will get off the freeway, park the car, shut it off and then get back in about 10-15 minutes later and it'll be good to go again, but sometimes it'll do it again and others it won't. It doesn't do this every day, usually happens at completely random times. I read somewhere that this could be a stepper motor so i took it to my mechanic and the stepper motor code came up. Where do I get a stepper motor for this car, and where would I get it put in at? Oh ya forgot to mention, the Dealer insists that I replace the gearbox...which conveniently costs ALOT more for me.