The GPM 20CrMnTi Steel 32/10T rear differential gear set is specified for the Traxxas Funco Pro Scale 2WD Sand Car to improve drivetrain durability. The spiral tooth profile provides more consistent load distribution and smoother meshing under torque. Upgrading the module to M1.6 increases wear resistance, and the set is offered as a direct swap for factory part numbers #10791 and #7792.