I have a 07 equinox that is running 4,000 rpm at 45-50 mph. Rpm goes higher as I accelerate and 1st, 2nd, and 3rd gear seems to be running higher as well. It's running 3,000 rpm around 30 when I know it should be less. I've read that it could be issues with the the clutch plate or torque converter but it seems like I've pretty much lost 4th and 5th gears or at least 5th gear. Doesn't seem to want to go past 3rd or 4th gear, am I about to lose my transmission?