Most aftermarket bushings comprised of polyurethane do need lubricated to prevent binding. Do the trailing arms come with zerk fittings so they can be greased? When they are installed it is customary to grease the sides where they bolt on to prevent them from squeaking and binding.
The rear suspension Trailing Arm bushings are likely worn out and/or the rear shocks are in need of replacement. There is an upper and a lower trailing arm on both sides of the vehicle in the rear suspension. As a test, grab a firm hold on the lower trailing arm and try to twist it. If your able to move it even a little, the bushings are shot.
It's most likely your lower Trailing Arm bushings that are severely damaged. It can also be the upper Trailing Arm bushings. Grab the arm and see if you can twist it. If so, it needs to be changed. You can get polyurethane bushings from 4x4parts.com or you can buy the entire arms from parts.com. I changed just my lower with polyurethane and the rocking stopped. I still need to replace the upper but I didn't like the dealer price ($600) and, like i said, my rocking stopped.
Since The Villager is of unibody construction, there are only a couple things that can be considered "subframe bushings". Sway bar bushings (front and rear), rear leaf spring bushings, and the most likely, control arm bushings.
Most likely the shifter bushings are worn making it bind
Cerlox binding, more commonly known as comb binding, was first seen during the 1950s and 1960s. The process was likely perfected in the earlier part of this generation.
The top control arm bushings are likely candidates.
Use a ball joint press. You can get one from Harbor Freight. You'll most likely need the accessory kit as well. You can use the press in different configuration to press the old bushings out, and the new bushings in. Even the front upper bushings in the axle can be pressed out, although it may be a little tricky setting up the ball joint press to do the job.
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Stable. The highest binding energy is for iron and nickel, which are the least likely to undergo fission or fusion reactions
you most likely have worn tie rod ends or inner tie rod bushings that need replacing.
Dialogue.
What is the reason that life is less likely on the outermost planets compared to the innermost planets