Maybe will be a better idea to start a new thread with this restoration, but I think I will post this initial “autopsy” process in this thread as a T-10 documentation.
-Starting with the axle and drum brakes:
-I didn’t take a photo, but the hubs externally are similar to a FF hub, but after remove the cap, I found a BIG axle nut, like a typical trailer hub.
-The drum looks like a rear 40 series. Because is only a hand brake system, the pads are almost new from factory. The front brake cylinder is equals to a 40 series, including the regulators, but the special characteristic is that the fluid lines have been not including from factory, instead, Toyota installed a plug. Therefore those cylinders brakes acts like a fixed support for the pads with the regulation option. The rear cylinder have an mechanical system for the expansion. An “oval” shaft that is actuated from external lever pulled by a cable. (the cable and the lever are missing in my trailer, don’t try to find it at the pictures).
-Leaf springs, shocks mount and U bolts, looks the same as a 40 series.
BONUS:
-Even I will have to sandblast the whole body, after removing some reflectors, It was a pleasure to prove that the original color paint from factory was: Beige …. That by chance is color of my FJ40

. Therefore, is not necessary to think a lot to choose a color…. The final color will be the same as my rig and also the factory trailer color.