I have a 2001 Holiday Rambler Endeaver with a Cummins ISC 330 and an Allison 3000 transmission. My alarm goes off when I put it in either D or R but goes off when it is in neutral. It did this earlier, but the alarm would go off after I drove a mile or two but now it stays on no matter how many miles I go. Anyone have this problem before? I hope it turns out to be something simple but I am currently stumped.