Originally Posted by hot rod
I should have read this before hijacking the other post. sorry about that. So I see the self leveling valve and air bags, but are there a pair of lower links hiding there somewhere?
What other other post?
As for your question about the rigid four-link and the need for a Watts link, that's a simple answer. Having the Watts link takes stress off of the arm assemblies and the link heims, prolonging the life of the heims and mechanically handling the force more accurately.
The assembly might work fine for a while without the Watts link, but there's no doubt it will work better with it.