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Ok. That's great news. It's been driving me nuts. Thanks

Thank you for that info!!!! I will look into it. The whistle I am hearing seems to be more from windshield but who knows. Thx again

Mine knocks constantly. I'm gonna follow up in a few weeks to see where they are with TSB progress.

When accelerating, I hear a knocking noise noticeable to passengers also. Brought in to dealer who researched it. Apparently Toyota is aware of the problem and is in the process of TSB. Was told its some sort of spark problem and will be replacing ECO computer when TSB is complete

I have a 2013 double cab. Also have a whistle in windshield. Brought it in and was told they didn't hear it. Would love to know if there is actually TSB. It's very annoying