Don't worry about the caps.
Worry about using 4wd hubs and no shaft in the hole.
The 4wd hubs don't stay assembled without the axle shaft through them.
Worry about using 4wd hubs and no shaft in the hole.
![2784_80400002750_511092750_2230712_.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fi651.photobucket.com%2Falbums%2Fuu235%2Ft01blaze%2Fother%2F2784_80400002750_511092750_2230712_.jpg&hash=89e792812127fa81e45cad43cb5bd874)
![2784_80399962750_511092750_2230708_.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fi651.photobucket.com%2Falbums%2Fuu235%2Ft01blaze%2Fother%2F2784_80399962750_511092750_2230708_.jpg&hash=c31385c4a47de8e7fb50730ef2ff6fa4)
![2784_80399957750_511092750_2230707_.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fi651.photobucket.com%2Falbums%2Fuu235%2Ft01blaze%2Fother%2F2784_80399957750_511092750_2230707_.jpg&hash=556b4baa314ef66210872e2f4dfa6aea)
The 4wd hubs don't stay assembled without the axle shaft through them.