i was wheeling this weekend in north ocotillo and i was going down a steep hill in 4lo and in L in my 96 4runner. on the way down it has a weird little nudge forward and then the speedometer tach went down to zero. now my speedometer is lazy and takes a while to get to the speed im going and doesnt really register slower speeds. i looked under to see if anything was disconnected and it wasnt i dont kno what it could be. please help with any suggestions.