My 18 Tacoma from first year always made a clinking sound when I slowed to a stop sign and or coasting. After a recent amount of recalls performed and no driving Taco for over 13 days I noticed this sound more frequently at stops and low coasting speed. I started to see that the 16 tacos had a software trans update. My 18 is at only 22k miles should this issue be considered normal ? Is that just how transmission work now a days ?