i have a 99 ford windstar,for the last 4-5 days when i start to drive the whole car shakes till about 15 mph and then when it shifts into second gear it shakes again not as bad as in first gear.it is an automatic after 25 mph everything runs perfect took it to a shop today and the repairman said something was wrong with the tranz. possibly the torque convertor.any help would be greatly appreciated.