-Mine never tick's & the exhaust is not un-even and rough when cold....Fast idle is normal;but the ticking & un-even/rough idle could be from poor maintenance from the previous owner.
-When my A/T is cold;i drive in manual mode & Up-shift around 3k'ish,,,while slowing down to turn or stop,Rev-Match will keep it in the proper gear without lugging engine.
After engine warms up;i then select D.
I also use manual mode when driving in slow moving traffic...In Drive,car is ready to roll & will Up-Shift between 73-7500rpm's...1-2,2-3,3-4 & 4-5th...it shouldn't hang or slip between shifts. (I do recommend a complete flush & fill)
-Car probably has an open differential (if not a Sport or Nismo) & clicking could be coming from the spider gears.....or you could have a rear diff. bushing failing (leaking oil or broken)
Keep oil clean in the engine & change at a shorter interval than recommended...@7500 RPM's,,,You don't need dirty oil.
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