Home Products BMW & BENZ KT-6377 BMW TRANSMISSION SOCKET (5HP18) KT-6377 KT-6377 BMW TRANSMISSION SOCKET (5HP18) BMW TRANSMISSION SOCKET (5HP18) Special design socket to remove the nut on transmission drive shaft flange. Size: 1/2" DR., I.D.: 53.5mm (4point) Applicable: 5HP18 / 5HP19 1710209