Ive had my trans looked at a couple of times now and for some reason the techs say its ok. But its slow to shift into gear, sometimes with a bang even. At low acceleration I hear a grinding noise coming from under the hood on the transmission side. And last night I was turning left onto a backroad and I accelerate normally when it popped out of gear, got to about 4000 rpm then jammed back in so hard that it spun the tires and the TC activation warning came on. Is a simple shift kit going to solve this or is my trans a sitting bomb?