Agreed. Years ago I used to jack under the diff of some solid axles but certainly not nowadays. Even jacking under subframes I use a substantial piece of timber to avoid damage. Any axle, be it containing a diff or just a straight beam will not work so well if it’s banana shaped. Even jacking under some subframes I use a substantial piece of timber to spread the load. If it’s a motor home then you would need to be even more careful as it will have the extra loadings of the fixtures and fittings.I am sure that I have read Fiat warning against jacking under the axle beam. I think that what I read may have been in the vehicle handbook, but it could have been in eLearn. The reason given was that there was a risk of bending the axle. Not something that you want to do.
My technique is to jack under, or close to, the point where the springs are fixed to the axle.
Good idea. I will try long bubble lever. It is a simple rear axle without diff. So i guess worst thing can be small slope of rear wheels, which will show as excessive wearing of rubber.I wouldn't put the jack in the centre of the rear axle either.
Nevertheless, If 'everything looks good' then you seem to have got away with it.
But you could hold a straight edge against the axle beam to check its still reasonably straight just to be sure?
I can't think of a better way to check its not damaged the geometry