Ok ill start from the begining. i changed out my shock oil to somthing a little more heavy 30 wt works beautifuly. but while i was out playing around on our gravel drive way the rear lost power. now when i pick the truck up the rear wheels spin just as much as the front but while its on the ground it dosnt spin them at all it looses all power. so i check out my bevel gear and there was no damage so i took my diff out. one of the screws was loose so i opened up the diff and there is no missing teeth nothing. the paper gasket in the diff was torn so i replaced it with an hpi replacement part. but i still have the problem ? any suggestions?[:@][:@][:@]