MACE M86 TORQUE-LOCK LSD DIFF TO SUIT FORD FAIRLANE BA BFThis Mace Torque Lock limited slip differential (LSD) uses a sophisticated design to provide a quiet, automatic splitting of torque. It performs like an open differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. The advantage of the limited slip differential design is apparent when comparing it to the standard or "open" diff. In vehicles with this older style