when I replace sway bar bushings I put the van on ramps, chock the rear wheels. Then I use 2 bottle jacks that are under the rear part of the sub frame. I unscrew one of the rear sub frame bolts about an inch, then use the bottle jack to slowly lower the sub frame down. Then I go to the opposite side, lowering again about an inch. I think about an inch is all that's really needed to allow for a box wrench to sneak in and unscrew the bolt that holds the sway bar bushing yoke in place. (only 1 yoke bolt is tight to get to). Once both bolts on the bushing yoke are out, replace the bushing and reinstall the yoke, bolts and torque. For the record, I've never been able to torque the rear bolt on the yoke as it's impossible to get a socket and torque wrench on it. I suppose a crows foot wrench and torque wrench would work (I don't have crows feet wrenches). Anyway, tighten it up as tight as it was coming off and you'll be fine.