Paul Guard limited slip, set to 80% https://pbase.com/9146gt/image/22512626 and using coarse splines https://pbase.com/9146gt/image/22512624
For any gearbox parts and needs, contact Matt Monson at Guard Transmission, here is his email address GTgears@Yahoo.com - Tel: (303) 530-1094, let Matt know Armando sent you... ; )