Undersling Jayco Sterling

Moving the axle(s) from the top of the springs to underneath.

another name for it is spring over conversion.

ahh i see.is this to get more ground clearance? if so why dont they do it from new? will it make the van more unstable? and why would it have to be resertisfied? sorry about the question.

Every state has different regulations, some require recertification if modifications are performed.

Caravan manufacturers juggle between offroad ride height/suspension dynamics/tow vehicle ball height (in relation to coupler height )etc etc etc.

Raised suspension is available from factory, but not every factory. Underslinging is a cheap and easy way to gain 90mm.

and yes, it can make it more unstable, but that can be offset by resetting the tow hitch so that it rides level with the tow vehicle.

Thanks for all the replies. King Springs don't do this work but they put me on to a guy called Bob Woods in Labrador. He can do the work but he said recertification isn't necessary under Queensland regulations. Would this be right?

Dave P

Hi Dave

Contact the Dept of Machinery / Transport Dept, in Upton Street
Bundall.

Cheers
Daza

Daza, I called Queensland Transport. The answer is certification is not required because underslinging a caravan that was manufactured with the axle on top of the springs is not allowed. The only exception is if the caravan manufacturer itself approves such a modification and that in itself is the certification.

Dave P