I did not have any problems with my tranny until I started adding performance parts. I have a 96' civic intake replaced resonator with performance cat, ractive 5" oval muffler tip exhaust and header back 2 3/4" pipe. If I am in full throttle and let off the gas in mid fourth overdrive kicks in really hard so I have kinda held back on it because I just hit 50,000 miles and no more warranty