2011 Forest River Sunseeker

JAN 16, 2015 RECEIVED LETTER FROM CHEVROLET COMPANY SAYING MUST GET UPDATED TRANSMISSION PROGRAM. HAD TRANSMISSION REPROGRAMMED WITH UPDATED PROGRAM EVEN THOUGH NO EXISTING PROBLEMS. TRANSMISSION STARTED SLIPPING AND JUMPING. FEBRUARY 27, 2015 RECEIVED LETTER FROM CHEVROLET COMPANY SAYING NOT TO GET UPDATE IF NOT HAVING TROUBLE. REPLACED WITH REBUILT TRANSMISSION AND STILL HAVE PROBLEMS. EVIDENTLY TRIED TO FIX EFFECT INSTEAD OF THE CAUSE. BEEN TO 4 DIFFERENT CHEV DEALERS WHERE 3 DIFFERENT TRANS TECHS (AT DIFFERENT DEALERS) ADVISED GETTING ORIGINAL PROGRAM REINSTALLED BUT CHEVY COMPANY WILL NOT AUTHORIZE WORK THEREFORE WILL NOT SUPPLY PROPER PROGRAM SAYING THE UPDATED ONE ON THE ONE IT NEEDED. FOR 27,000 MILES HAD NOT ONE PROBLEM WITH TRANSMISSION EVEN IN ROCKY MOUNTAINS. CUSTOMER ASSISTANCE BEEN CONTACTED NUMEROUS TIMES WITH NO RESULTS. THEY ADVISED 2,000 - 3,000 MILES FOR TRANS TO ADJUST TO DRIVING HABITS, ETC. AFTER 2,600 MILES RUNS WORSE SKIPPING AND SLIPPING (EVERY 5 - 10 SECONDS) EVEN AT HIGHWAY SPEEDS AND ESPECIALLY STARTING AND STOPPING IN TRAFFIC. NOW THEY SAY TAKE IT BACK TO A DEALER TO GET CHECKED AGAIN. CALLED DEALER AND THEY SAY NOT TO BRING IT BACK BECAUSE CHEVY WON'T LET THEM WORK ON IT. HELP! THEY, (CHEVY), SAY DRIVE IT EVEN THOUGH IT IS UNSAFE. IF IT STOPS OR STALLS IN TRAFFIC THERE COULD BE ACCIDENT AND HURT PEOPLE AROUND IT. HELP! I'M CAUGHT BETWEEN ROCK AND HARD SPOT. 27,000 MILES NOT ANY PROBLEMS UNTIL CHEVY UPDATED TRANS PROGRAM AND WON'T FIX IT -- 8 MONTHS LATER. STILL UNDER WARRANTY. THERE HAVE BEEN NO COMPUTER CODES DURING THIS WHOLE MESS, THEREFORE I BELIEVE THIS IS THE PROBLEM. THEY DO NOT KNOW WHAT TO DO. THE COMPUTER ITSELF COULD BE THE PROBLEM BY NOT ACCEPTING THE UPDATED PROGRAM OR SOMETHING. MY WIFE AND I ARE UP IN AGE AND THIS WAS TO BE OUR RETIREMENT VEHICLE. HELP