Toyota Repair: Sienna wheel alignment, front wheel alignment, sears auto center

Question
I sent my 1999 Sienna LE to Sears Auto Center for wheel alignment. They fixed the front wheel alignment based on the information their alignment machine instructed (through adjusting Camber, Caster, Toe). However, despite the fact that the machine says that the rear wheels (both left and right) are not aligned, the machine only says that "the manufacturer does not specify rear Camber and Toe adjustments". Because of that, Sears Auto can not fix the rear wheel alignment. I am wondering whether I can get the info from you and pass it to Sears Auto, and ask them to fix the rear wheel alignment. If there is no way to fix the rear wheel alignment, what would be the possible implications (how much damage it could cause to the van and which parts will be mostly affected).

Thank you very much.


Answer
The rear axle is a solid axle and there are no adjustments possible, if the specifications are not within limits there could be a component that may be bent, in any case the only way to correct it may be to replace the rear suspension axle, in most cases if there is only a small variation it will not have a great effect on tire wear, if you are really concerned and need to have the specs absolutely perfect the only solution other than replacing parts is to take the vehicle to a body shop that can deal with straightening the axle or body as needed.