If this is a Dodge Van, Dodge vans have Strut rods which connect from frame to the lower control arm of the front suspension. The length of this strut rod and its bushing affect caster. When worn and backing up and braking in reverse, there is usually a clunk when nearing a stop.
If a Dodge Van it has Shocks, not struts on all 4 corners, replaceable separately from the coil spring. The fronts are One bolt on top, two in the bottom, and nearly as simple to replace as it sounds to replace them.
Strut rod bushings are rather easy to replace and are rather inexpensive bushings and are located where the strut rod meets the frame bracket. Cannot miss it..
These bushings can fail, but appear perfect on visual inspection. Only on removing the bolt and washer can one see if the internals of the bushing are shredded, or has allowed the strut rod to migrate from center.
'Struts' AFAIK, and I am not seriously experienced mechanic, are a shock and spring combination in one mechanical unit.
I don't know what Vehicle Bitty has, but the strut rods, vs struts can be very different.
Here is a pic of my low mileage Moog 'problem solver' strut rod bushings:
If Strut rod bushings are worn and in place for too long, this metal hole becomes Oval. You do not want your hole Oval.
Oooooh That's what she said!!!!
Sorry.
Worn strut rod bushings can cause clunking over bumps, as well as pulling to one side or the other when braking hard.
When I replaced the low mileage Moog black rubber Strut Rod bushings for the red polyurethane Energy Suspension bushings, it was night and day difference when braking.
If the strut rod bushings are worn and crush too much when braking, it will cause abnormal tire wear, especially if the back brakes are not adjusted correctly and working hard enough. It also is harder on the control arm bushings as the whole suspension is allowed to flex too much when braking.
http://www.amazon.com/Energy-Suspension-5-7103R-Strut-Bushing/dp/B000JK60N2
If you have a Dodge van, replace these, if you have not yet done so:
http://www.amazon.com/Energy-Suspension-5-7103R-Strut-Bushing/dp/B000JK60N2.
I heard Poly bushings squeak and transmit too much road vibration and was leery of using these on the Strut rods, but absolutely no regrets, should have done it sooner. I used Syl-glide on the poly bushings. No squeaks
If the vehicle in question is not a Dodge van, apologies for meandering off topic, but perhaps it will help someone with a Dodge van and an annoying clunk or a pulling when braking hard.