Formerly new in the OEM box - NOS GM correct fitting 2 speed rear axle front unit helical gear – GM P.N. 2067019 – fits some 1974-1982 Chevy and GMC Medium truck – 24 tooth count – 21 spline inner bore - may fit other makes and models as well – it is up to you to verify part number and pictures against your application – very dirty and sooty former GM dealership inventory in vintage NOS condition as shown - never installed – some surface rust – being sold as used – will need the rust cleaned up before installing – MISSING installation nut