2006 Hyundai Santa Fe Transmission Problems

AT FIRST I NOTICED THAT SOMETIMES (RANDOMLY) WHEN I STARTED MY CAR AFTER SITTING FOR A LONGER PERIOD LIKE 6 OR 8 HOURS THAT I'D TURN THE KEY AND WITHOUT PRESSING ANY PEDALS THE VEHICLE'S RPMS START TO CLIMB UP SLOWLY. IT MAX'S OUT AT 4000RPMS AND STAYS THERE FOR AWHILE THEN WILL DECREASE ON ITS OWN AFTER AWHILE (RANDOM TIMING ALWAYS). IF I STEP ON THE GAS AS ITS REVVING UP IT RELEASES AND GOES BACK DOWN. IF I BRAKE IT DOES NOTHING. SO AFTER A FEW WEEKS OF NOTICING THIS PROBLEM, TAKING IT TO THE MECHANIC AND HAVING THE THROTTLE BODY CLEANED, AND A GASKET REPLACED THE VEHICLE HAS NOW STARTED TO REV UP ON ITS OWN AFTER I RELEASE THE GAS PEDAL WHEN DRIVING AT HIGH SPEEDS OF 80 OR OVER. I LET OFF THE GAS THEN IT REVS UP QUICKLY TO 4000 THEN AGAIN QUICKLY SHOOTS BACK DOWN BELOW NORMAL. IT DIDN'T DO THE HIGHWAY PROBLEM AS MUCH I NOTICED WHEN THE FUEL WAS LOW, BUT WHEN I FILLED MY TANK THE PROBLEM CAME BACK AGAIN. IT DID STILL REV ON IT'S OWN FROM COLD START THE WHOLE TIME STILL REGARDLESS OF FUEL LEVEL. I NOTICED THIS WEEK IT NOW JUMPS WHEN I PUT IT IN DRIVE OR REVERSE AFTER A COLD START AND THE OTHER DAY IT SEEMED TO LOSE ITS GUSTO AS I WAS TURNING A CORNER, THEN IT REVVED HIGH AND WENT BACK TO NORMAL. THIS IS ALL VERY SCARY AND I AM CONCERNED AS I READ MORE AND MORE THAT THIS IS A WIDE SPREAD PROBLEM THAT COULD CAUSE INJURY OR FATALITY. NO ONE SEEMS TO BE ABLE TO SAY WHAT THE PROBLEM IS, JUST THAT IT COULD BE A BUNCH OF THINGS. *TR

CAR RACES AT IDLE WHILE IN PARK OR NEUTRAL TO 3,500 RPM. WHILE IN DRIVE OR REVERSE THE CAR CONTINUES TO RACE BUT AT A LOWER LEVEL(1,200-1,500 RPM). THE CAR SURGES WHILE BRAKING REQUIRING HARDER PEDAL PRESSURE THAN NORMAL. RACING IS CONTINUOUS AT ALL SPEEDS REQUIRING LESS ACCELERATOR PRESSURE THAN NORMAL. A COMPLAINT WAS FILED TODAY 1/19/15 WITH HYUNDAI AND A CASE # 7614630 WAS PROVIDED. THIS OWNER EXPRESSED HIS CONCERNS TO HYUNDAI REPRESENTATIVE WITH SAFETY OF CAR DUE TO RACING AND SURGING ESPECIALLY UNDER WET OR ICE CONDITIONS. THE REP. SCHEDULED A SERVICE APPOINTMENT WITH THE HYUNDAI SHREWSBURY, NJ DEALERSHIP FOR 1/22/15. *TR

POOR GAS MILEAGE, HARSH SHIFTING OF TRANSMISSION. *TR

AT THE RECOMMENDATION OF THE DEALER MECHANIC I HAD A TRANSMISSION FLUSH DONE. NOW THE CAR IDLES ERRATICALLY, AND SURGES WHEN SLOWING TO A STOP. AT TIMES.WHEN STOPPED THE IDLE DROPS TO 300-400 RPMS, ALMOST A STALL, AND SOMETIMES IT JUMPS TO 1200-1500 RPMS AND WANTS TO LUNGE FORWARD. I HAVE TO MAKE SURE I AM REALLY STOMP ON THE BRAKE, OR ELSE I WOULD HIT SOMETHING. I TOOK THE CAR TO THE DEALER, AND THEY SAID THEY USED THE COMPUTER AND FOUND NO CODES, SO NOTHING WAS WRONG. THEY RECOMMENDED AN INJECTOR FLUSH, THOUGH THE CAR SEEMED TO RUN FINE AT SPEED. *AK