The Beverly Hillbillies (1962)

S4E17 The Trotting Horse

Granny requests Jethro to teach her how to drive. However, after just one lesson, he decides to give up. Meanwhile, Mr. Drysdale persuades Jed to buy a trotter. The Clampetts' intention is for the horse to take Granny into town whenever she wishes, eliminating the need to wait for Jethro. When a man shows up with the horse, he also brings along a racing buggy, but the Clampetts mistake it for a typical buggy without sides or a roof.