Transfer case gear ASM with drum clutch (PL72 ATC) 1 inch / 2.54 cm

Common signs of a failing clutch drum or assembly include jerking during acceleration, shuttering or vibration while turning at low speeds, and a binding sensation in the drivetrain. These issues often occur when the internal plates or the drum housing itself can no longer facilitate smooth engagement.

Yes, the PL72 ATC transfer case is most commonly found in Porsche Cayenne models. This specific 1-inch (2.54 cm) version is designed to hold the clutch plates, springs, and spacers required for the ATC system to function correctly. Always verify your specific transfer case model before ordering.

Jerking is often caused by the clutch plates slipping or sticking within the clutch basket (drum). If the drum is worn or heat-damaged, it won’t allow the plates to engage and disengage smoothly, leading to the physical ‘thumping’ or jerking sensation you feel.

If the internal gears and chain are still in good condition, replacing the clutch drum assembly is a much more cost-effective solution than buying a complete new transfer case. This part addresses the most common wear point in the PL72 ATC unit.

This measurement typically refers to the specific width or sizing configuration of the gear and clutch housing used in this PL72 ATC variant. It is crucial to match this specification with your existing unit to ensure proper fitment of the internal stack.