ok i just got done putting swamping to a sm465 and a divorded np205 both used. i did a new clutch and flywheel fluid in both and all the other stuff. I drove truck today for first time and every thing seemms great when im going slow first starting off then i hear this horrible gring noise when im in any gear and off the throttle. But when i punch it dont hear grinding at all. even if i am driving and take it out of 3d to coast and put it in netural i hear grinding noise. But if im at a complete stop i hear no grinding. i think the trans is shot noise sound like its comming from there as well. but it guess it could be the tcase as well. but i checked and its in 2 wheel high.(going to try other gears in tcase tommorow just to rule out the noise is in the trans). i thought the 465s were usually tough did i just get a bad one someone destroyed or did i do anything wrong. sorry for all the info but was wondering if u guys ever had something like this happen. also how much will it be to rebuild around.