Guys you wont believe this. Thought it was exhuast leak, coolant rushing through heater core, bracket loose , evap sonlenoid, non of the above. Open you hoods and check to see if the Transmission fluid Check dip stick is rubbing on a bolt that goes right through the fire wall, If it is just pry toward the front of the vehicle away from the bolt. Problem solved, its so nice to hear the throaty exhuast once again!

Good Luck.