Hi...(Sorry for the delay, I am not getting my notices about thread updates.
)
It is not needed, it is just a differnt type. It using barrings vs compression. Seeing it uses barrings it moves more freely and take less effort.
You can find more about the product here...
http://www.ssrvowners.com
Bell Crank...(ss100 model)
http://ssrvowners.com/uncategorized/sup ... nk-arms-2/
http://ssrvowners.com/uncategorized/ss100-bell-crank/
I also HIGHLY recommend the SuperSteer Motion Control check valves. It is Night and Day!
http://ssrvowners.com/uncategorized/sup ... ol-unit-2/
As far as install of either of these products, their are dealers where you can just purchase them, or buy direct, and any truck shop should be able to put them on. (even Camping World sells and installs)
Take care.