Have new radiator, new coolant, new thermostat.

Have new radiator, new coolant, new thermostat, new hoses, car runs normally MOST times temperature guage registers around 11:30(12 o'clock being straight up)sometimes while driving around 60 MPH the temperature guage needle will swing nearly over to the red, without slowing down the needle will hover close to the red then start dropping to its normal level. Heat is normal no loss of fluid car runs great