I just finished making this rear axle holder. This is the third rear axle holder I've made. The first two were left with the customers, as it was their wood. I intended to make just the holder as in the first picture, but as soon as I got that done I figured why not add a handle and lid so I'd have a nice storage box for my Model A special tools, or at least the rear axle tools.
It's 13" wide by 20" long and the sides are made from 2 x 6's. The bottom is 3/4" plywood. I cut a rabbet in the top 3 boards for the lid to slide in. It's plenty heavy to hold the complete rear end and torque tube assembly with no additional support needed for the torque tube. I need to make a plug for the hole to keep the mice out, and after the wood dries for a couple months I might paint it.
I'd like to see what others are using to hold the rear axle during a rebuild.