rear end noise

[allen]

while driving my Vicky yesterday, i heard a noise in the rear end, this happen after i adjusted my brakes had a slight drag in the rear and was turning around to go back to adjust when a loud pop and the car drag to a stop, fearing this was it i tried to move off the road and found it took off OK drove it home, there i found read end grease on the right rear tire and when you turn on wheel it turns easy backward and drags forward the other just the opposite when you drive it feel like the brakes or on any thoughts have a spare rear end thanks AL