CHEVROLET TRANSMISSION NOT SHIFTING

My Vehicle Isn't Shifting Correctly, Erratic Speedometer, Erratic Tac Checked Fuses. Fuse 20 Inside Vehicle Is A 10amp Fuse But Isn&#...

Won't Shift Up, Revs Super High, Speedometer Not Working Until I Hit A Bump. Changed These Items: New A/c System(entire), Brake...

Used Transmission Has Been In Truck For A Year And A Half. No Problems. Took A Trip From Houston To Dallas No Problems Until On The Way Back...