2014 Ford Taurus Police Interceptor

I TOOK MY 2014 FORD TAURUS POLICE INTERCEPTOR TO BOGGUS FORD IN HARLINGEN, TX. FOR A RECALL ON A FUEL PUMP SENSOR WHICH THE DEALER SAID WOULD COST NOTHING TO REPLACE. I HAD TO BUY THE PART AND INSTALL IT TO GET THE VEHICLE THERE. DUMB, I KNOW, BUT IT WAS CHEAPER THAN A TOW TRUCK AND I WANTED IT CORRECTED BY THE DEALER FOR SAFETY PURPOSES. DURING THE DRIVE THERE I NOTICED A CHECK ENGINE LIGHT ON SO I REPORTED IT. I ALSO REPORTED TO THEM THAT THE VEHICLE HESITATES, OR JERKS, WHEN DRIVING AT LOW TO MODERATE SPEEDS. THEY CORRECTED THE RECALL AND CHARGED ME $145.00 FOR ANOTHER SENSOR THEY CLAIMED WAS CAUSING THE CHECK ENGINE LIGHT TO COME ON AND THE CAR TO JERK LIKE IT WAS. I DROVE OFF AND IMMEDIATELY NOTICED THE CAR WAS DOING THE SAME THING. I TOOK THE CAR BACK TO THEM AND THEY WAITED 2 DAYS TO TELL ME THAT THE CAR WAS RUNNING AND DRIVING JUST FINE AND THEY COULD NOT FIND ANYTHING ELSE WRONG WITH THE MOTOR OR TRANSMISSION WHEN THEIR TECHNICIAN DROVE IT. I ASKED HIM TO RIDE WITH ME IN THE CAR AND AFTER ABOUT 5 MINUTES OF DRIVING HE HAD ME PULL OVER AND TURN THE CAR OFF SO THAT HE COULD "CLEAR ALL CODES WITHIN THE TRANSMISSION." THE PROBLEM CONTINUED SO THEY TALKED ME INTO TAKING THE CAR HOME TO "SEE IF ANY CHECK ENGINE LIGHTS COME ON" DURING REGULAR USE. AFTER DOING SO, TO NO AVAIL, THEY SAID THAT THE PROBLEM WAS TRANSMISSION RELATED AND IT WOULD COST ANOTHER $100.00 JUST TO LOOK AT. I DON'T MIND PAYING THE FEE FOR DIAGNOSIS BUT I'M HESITANT TO TAKE IT BACK TO THEM IF I MAY BE CHARGED FOR ITEMS NOT RELATED TO THE ISSUE. I TOOK IT UPON MYSELF TO DO RESEARCH ONLINE AND I HAVE FOUND OTHERS WITH THE SAME EXACT PROBLEM THAT TURNED OUT TO BE A SOLENOID IN THE TRANSMISSION. WONDERING WHY THIS PART HASN'T BEEN RECALLED IF IT COULD DEEM THE VEHICLE UNSAFE TO DRIVE. ALSO, THERE IS NO DIPSTICK TO CHECK TRANSMISSION FLUID OTHERWISE I WOULD HAPPILY CHECK IT MYSELF.