[BarryGMC]

Our gmc trucks only came with 2 types of traction aids the d44 and d 60 used a power lock and the eaton in the one ton used a no spin. The 30 spline power locks also came in international and dodge trucks until 72. Look at all of these and you may find one. I find these all of the time. The little sputnik thing is a no spin. This is a true locker and was installed from chevy in 3/4 ton and one ton trucks until 72. The 60-66 trucks have a sticker on the glove box, and the 67-72 have it listed on the build sheet in the glove box. The no spin replaces the spiders in the carrier.