Re: Differential as rear jack point?
It's ok, as long as they stay away from the diff cover. You're correct, it's a stability issue. Especially on a van that could be loaded heavy at either corner. I do it all the time. If the van is going to be up for more than a few minutes, I'll throw some jack stands under the axle for a little extra security.
02 E350 7.3 (V4)
17 Focus RS, 90 SHO, 49 CJ2A, 89 LSC, 20 T250 AWD