Q: i have just perchased the car and the tires are new. thanks ok so i quess it cant be a tire since it is automatic so does any one know what it could be?
A: Nissan 1.8 liter auto transmission Sentra with 2-3 up shift chirp at moderate throttle is an easy fix there are two cans of trans fluid modifier. Order buy and install your self along with a fluid drain and fill. That sentra drain and fill takes 3 quarts and those two cans to fill. with two cans and 2 quarts dextron 3 mercon run motor 10 minutes to circulate the new fluid and warm up the fluid add additional fluid as necessary to get the dipstick level just right. Part number for Nissan 31003-31X61P 2 cans fluid modifier. Don't get any modifier on your hands wear rubber gloves to be safe around used drain trans oils and any additives even engine oil is not safe.