MY CAR JUMPS OUT OF 4TH GEAR OR IT WONT GO IN UNTIL I HAVE SHIFTED IT IN SEVERAL TIMES BUT IF I DOUBLE SHIFT IT INTO THIRD IT WILL THEN GO IN TO FOURTH. ALSO IT WON'T DOWN SHIFT INTO THIRD--GET A GRINDING NOISE. BUT I SHIFTS FINE WHEN COLD. IS IT TIME FOR A REBUILD OR A CLUTCH OR NEW FLUID(RIGHT NOW I AM USING ATF CASTROL DEXTRON/MERCON 3 THE STEALER TOLD ME TO RUN THAT IN THE WINTER TO ELIMINATE HARD SHIFTING. TIA 2ALL