1966 A904 loses all gears overnight

Low/reverse servo and band are not used in drive range for first gear; the one way roller is. There is only a few things that will cause absolutely no forward and no reverse ranges at all, and most of them are already ruled out from his previous inspections. The one and only 904 that I personally had shear off a converter hub never made an unusual sound and just felt like it went into neutral while driving down the road at steady speed. Testing pressure would rule this out.