Steering Shaft Coupler Disc
The linkage that connects the steering wheel to the steering rack is a v-shaped system made up of steering shafts, shaft flanges, flexible rubber coupling discs, and u-joints. Over time, the rubber discs can wear out, and introduce slop into the system. So, if your steering wheel moves side-to-side a bit before the van begins to steer, the rubber discs are the first parts to look at. Luckily, the parts are readily available, and changing them is quite easy.
Manual Steering Vans - require THREE of these rubber discs.
Power Steering Vans - require TWO of these rubber discs.