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I have a 2000 Grand Prix GT with the 3800 non-supercharged engine. The issue I have been having is the transmission will not shift into overdrive. The RPM’s will stay around 3000 at 55-65 MPH. I recently got a “P0742 Torque Converter Clutch Solenoid Circuit Stuck On” code. I cleared the code and it hasn’t come back on since but, is still not shifting into overdrive 4th gear. Tonight when driving on the highway at about 60 MPH The Tachometer dropped to zero and stop registering the RPM’s and the TRAC OFF light came on. Shortly after the “Service Engine Soon” light appeared. When I hooked it up to the Diagnostics I got a different code. I received a “P0336 Crankshaft Position A Circuit Rand/Performance” code. I looked under the hood and didn’t notice anything broken or disconnected on the different sensors. I couldn’t see the Crank Shaft Position sensor because I believe it is on the back of the engine below the exhaust manifold. Does this sound like a sensor issue or is it an issue where the Transmission may need rebuilt? Thanks in advance!
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