nathand22 is right about the pollen filter - i had the same thing in my 2010 ST a while ago after it was changed during a service. Nissan re-adjusted it at its next service and it was fine no more whistle
I wouldn't usually use low range 4th but in this instance on the particular terrain i was on found 2nd and 3rd low to be doing really well but just going into 4th in certain parts as stopping and changing to 4 high wouldn't have made sense but yes next time i'm at a dealer i will ask about it...
I have a 2010 ST and just noticed this same thing a few days ago on a track that required low range as it was steep,rutty and rocky and 4th low would have been perfect in some smoother parts except for the surging! I have no idea as yet will do some more research and hopefully some one else may...
I also have the Long Ranger in my 2010 Thai ST fitted in April 2011 for 1350 full of fuel and has been great! Initially had a drama with the fuel gauge not going back up to full but they had installed the sender wrong or something and was rectified and no probs since. Clearance is fine but does...
I thought that you may have been out of warranty but maybe you should speak to Nissan anyway incase they see it differently as in a fault they may honour etc..They didnt indicate that the problem was detrimental to the engine in anyway either. The noise on mine was near the turbo intake on...
Hi roscoe07, I have a 2010 ST and had the exact noise you describe and your on the money that its a solenoid! For mine it was the VNT solenoid to do with the turbo. Nissan advised that it was a known problem recorded on their system and had a specific fix to do with the way its mounted. Had to...