Hi I have a 1994 ford explorer sport 4+4.I Had the clutch replaced 6 months ago. then one day i was going down highway at 70 mph and out of the blue it reved up real loud . and it does not move in any gear just reves the engine.4.0 5 speed. please help

 

Clutch or tranny, take it back maybe a part of the clutch job failed