Transmission slips very badly when going around a left hand corner. Also it will no longer go into \\"overdrive\\" so to say, and runs at 2800 RPMs at 70 mph, when it really should be at 2200. The RPMs waver a lot or go up very high when the transmission is under stress (up a hill or accellerator is depressed). This code (P0741) shows up every time the engine over-revs. Any thoughts on what it is?