"Hellwig" Helper springs/Opinions?

[Peff]

My 96 Caravan SE has developed a sag on the driver's side. The
left leaf spring has a different arc than the right one, leading me to
believe that it is the problem. I have ordered a set of helper springs
from Hellwig. These springs only attach to the rear half of the leaf springs,
behind the rear axle, and clamp to the top. I plan to crank up the tension
on the left/driver's side spring more than the right one to help
compensate for the one-sided sag issue. Think this will work??

[slischyn]

Do you have ABS. If not, there is a sensor that adjusts the front to back brake ratio. The Hellwig will mess this up. If you have ABS, the sensor does not exist so the brakes should function normally.
Steve L.

[Jeff_Taylor]

I think I would hit the local junkyard and get a couple of rear springs.