The '64 Skylark had a regular differential, which anyone who's been stuck in the mud in Alabama knows, you step on the gas, one tire spins, the other tire does nothin'.
12 seconds sound clip from the My Cousin Vinny movie soundboard.
You can hear this line at 01:46:56 in the Blu-ray version of the movie.
Quote context
[...]
- The car that made these two equal-length tire marks had positraction.
- You can't make those marks without positraction, which was not available on the '64 Buick Skylark.
- It's a limited slip differential which distributes power equally to both the right and left tires.
- You see when the left tire mark goes up on the curb and the right tire mark stays flat and even?
[...]