[b454rat]

Some people love em most hate em, but the govlock GM pits in their late models. In the early 2000s GM vans had Dana 60s and 70s, using the govlock. In case you don't know what one is, it's a locker/posi that locks when one tire is spinning roughly 100 rpms different than the other. They are easily to engage, just lightly spin the tire and it will lock, let off the gas and it will unlock. The smaller axles they are called grenade locks used they usually blow in spectacular fashion, but the bigger ones hold up better in normal use. Now how they are in a Dana I'm not sure. I'm not sure on the spline count either, I never had one to pull apart. But your axle I believe is 30 spline, possibly 16 or 19 can't remember. But an axle change shouldnt be too hard to find, and easy to do. A tracklok or power lock would be the next two options....