Hi since I have had my 350z it has always been slightly slow when taking off to go into first gear, I think it's called stall speed, I can hit 5 thousand rpm!
Now recently it has been getting worse and when stopping you can hear after about 10 seconds it shifting into another gear. Extreamly slow at downshifting. Car now sometimes gets stuck in 5 th gear at stop and start and this is resolved when I turn ignition of and on again. Very strange! Then the AT CHECK light flashes.
About 3 months ago I put gearbox oil in as I leaked it out when I had the rad of. I think I put too much in, now I corrected the level of oil still same problem.
Any ideas???