This is what we call the Visco Lock, typically found in the Defenders, Mavericks with  X3, Trail, and Sport designations, and 2021+ Commanders.

Halo Items Available For Vehicles With This Differential:

• Full positive lock electric locking differential kit with billet case lid for stock axles (Found here)
• Full positive lock electric locking differential complete with billet case lid for stock axles (Found here)
• Full positive lock electric locking differential complete with billet case and lid with upgraded chromolly 6 gear differential carrier for stock axles (Found here)
• Full positive electric lock locking differential complete with full billet case and lid with upgraded chromolly differential carrier, large 6 gear forged spider gear set, for use with large aftermarket axles (Found here)
• Full open non locking differential with full billet case and billet differential carrier with upgraded chromolly 6 gear differential carrier for stock axles (Found here)
• Full open nonlocking differential complete with full billet case and lid with upgraded chromolly differential carrier, large 6 gear forged spider gear set, for use with large aftermarket axles P/N H-HALO-30-RCRX
• Large spline axles for Halo 30 series differentials (Found here)
• Varius accessories, replacement parts and lockers (As listed below)