FORD TRANSMISSION SLIP

My 1999 F150 (owned 1 Week) W/ V6 And Auto Trans Is Making A High Pitched Buzzing Noise After Warm Up Like A Ratcheting Sound Your Hand...

When My Transmission Goes Into Overdrive, Transmission Slips Like It Is In Neutral. 1st, 2nd, And 3rd Are O.K. If I Shut Off Overdrive...

Overdrive Flashes Off. Transmission Is Slipping.