2009 Infiniti G37

2009 INFINITI G37X COUPE IS EXPERIENCING DANGEROUS SURGES IN ACCELERATION UPON BRAKING, THE TRANSMISSION IS JERKING AND GOING INTO "FAIL SAFE MODE" (MEANING SUDDENLY THE CAR IS STUCK IN THE HIGHEST GEAR), THE REAR DIFFERENTIAL IS CLUNKING AND JERKING AS IF THE CAR IS GOING INTO AWD MODE AT TIMES IT SHOULD NOT BE, AND QUITE FRANKLY I AM NOW BECOMING SCARED OF THE CAR. IT HAS 3800 MILES ON IT. I TOOK IT INTO THE DEALERSHIP ON FRIDAY AND WAS TOLD THERE ARE A COUPLE OF KNOWN ISSUES WITH THE TRANSMISSION BUT NO FIX. THEY ALSO ARE CALLING HQ ON MONDAY TO TALK ABOUT IT. I DO NOT WANT TO LEAVE MY CAR TO BE DRIVEN AROUND ERRATICALLY AS THEY TRY TO "BREAK" IT AS THAT WILL CAUSE FURTHER DAMAGE TO THE TRANSMISSION AND ENGINE AS WELL AS PUT MORE MILES ON THE CAR. INFINITI SERVICE AGREED THAT REMAPPING THE COMPUTER WOULD MOST LIKELY TAKE AWAY THE SPECIFICATIONS OF THE CAR WHICH ARE WHAT THEY MARKET AND I BOUGHT THE CAR FOR (HORSEPOWER, ACCELERATION, "SAME AS A BMW". IF THEY HAVE TO GUT THE POWER OF THE CAR TO FIX THE PROBLEM, I FEEL THIS IS FALSE ADVERTISING AND THE CAR IS NOT WHAT I CONTRACTED TO PURCHASE. I AM ON THE VERGE OF WATCHING MY RESALE PLUNGE BEFORE THE CAR IS EVEN SIX MONTHS OLD AND BELIEVE INFINITI SHOULD HAVE TO REPLACE THE VEHICLE. THIS PROBLEM IS HAPPENING REPEATEDLY EVERYTIME I DRIVE THE CAR. SEE NOTES BELOW: 1. CENTRAL COMPUTER CLEARLY FAILING - HAD TO BE RESTORED YESTERDAY. 2. REAF DIFF CLUNKING IN AND OUT OF AWD LOUDLY AND WITH A JERK AND AT UNEXPECTED TIMES 3. SURGING RPMS AS MUCH AS 5000 UPON DRIVING 4. SURGING RPMS AND ACCELERATION UPON BRAKING (3000 RPM) 5. HANGING INSTEAD OF DOWNSHIFTING 6. VERY JERKY DOWNSHIFTS 7. TRANNY WENT INTO FAILSAFE AT LEAST 3 TIMES NOW (MEANING NO GEAR BELOW 5TH IS AVAILABLE AT ANY TIME). *TR