I had to go with what was available...
Here's a fan letter regarding this problem
Why is it after replacing a new belt and new tensioner, the belt comes off in the rain, snow and going through puddles? I wasted money on these and they are less than a year old and I have to replace them with a kit containing the same thing except they are grooved?
It came off on my wife over a dozen times. No power steering (no control), no water pump (engine overheats causing dangerous to aluminum heads), no alternator (no battery charging), no AC. All powered by ONE belt. $40 a pop to put the belt back on. An independent recommended a kit, parts and labor, over $300. We then found a radiator leak, thinking the slick antifreeze was causing the belt to come off, so I spent the $300 replacing a new radiator. Still the belt came off.
I have looked over numerous forums on the web and with all the problems with Dodge, Plymouth, Chrysler vans, why do we have to pay to get it fixed?
I thought I'd be smart and start out with some "cheaper fixes". One guy was selling disks to put over the tensioner and idle pulley for $30. I found the disk covers from Advance for $8 apiece and installed them on both idle and tension pulleys and thought how smart I was until I went through a puddle...twice and both times it came off. I started looking at the Dayco 89251 from Advance, but it is a smooth tension pulley. My wife called me today and guess what...she went through a puddle. So..here I am ordering a Gates 38379K kit from Amazon $111.63 incl. S & H. Advance has Goodyear kit 49215K for $124.99 plus tax, but it had to be ordered. You can also order separate double sided belt, grooved idle and tension pulleys, but they total more than $111. The double sided belt is over $65.
CONTACT THE NHTSA on their web site or call them at 888-327-4236. I am surprized if someone hasn't gotten KILLED yet!!! 
