1997 Jeep Wrangler 4.0 Liter. When taking off there is a grinding noise which sounds like it is coming from the front of the vehicle. I have tried in both first and second gear and the grinding sound is there. Roll starting in neutral there is no grinding sound. Also I lifted the Jeep off all four wheels with jack stands, started the Jeep and shifted into first and second with no grinding sound in both 2 WD and 4WD. Grinding sound only occurs when accelerating from a stop. Please help.