Will a 4 cylinder 1993 mustang transmission mount to ford ranger transfer case?

No, a 1993 Mustang 4-cylinder transmission will not directly mount to a Ford Ranger transfer case. The bolt patterns, input shaft size and spline count, and overall case design are all significantly different. These are completely different transmissions designed for different drivetrains. The Mustang uses a front-wheel-drive transmission, while the Ranger uses a rear-wheel-drive or four-wheel-drive transmission/transfer case setup. You'd need extensive custom fabrication to even attempt such a conversion, and it's not a practical endeavor.