I have found a field fix kit that addresses the belt jumping issue. Goodyear offers a special belt (ribs on both sides) for 1996-2000 Chrysler
3.0L vehicles. Call your local Goodyear distributor and ask for the
49204K. This kit comes with a new tensioner and a new idler pulley allong with the special belt. I tried it and it works awesome. No more belt falling off while driving though water or snow!