effect of rearend gearing on ET's

in this thread is where i got the full version- just downloaded it and followed the install notes
http://www.svtperformance.com/forums/showthread.php?p=6474237

As far as vehicle weight goes i have it entered at 3410lbs which they say is stock chassis weight for a duster....either way i agree with you guys, something is seriously wrong...i will read those pages of the chassis manual and see what i can figure out