A selected sort of switch case, recognized by a particular numeric code, is configured in a way the place it’s not immediately hooked up to the transmission. As a substitute, it’s mounted individually, usually to the automobile’s body, and related to the transmission output through a driveshaft. This configuration permits for larger flexibility in drivetrain structure and is often present in older four-wheel-drive automobiles.
This design provides benefits when it comes to adaptability to totally different automobile lengths and chassis configurations. Traditionally, it was a typical answer when mating transmissions to axles with vital distance between them. The unbiased mounting also can simplify servicing and modification. Nonetheless, it introduces a further driveshaft and related u-joints, which might enhance complexity and doubtlessly lower total drivetrain effectivity.