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Message: [QUOTE="andrewtac, post: 1495028, member: 28439"] I have stock 18s and gear (355); 2016 streetmax x and dual fuel. I had that issue with the Midwest tune prior to going dual fuel. I have tried two tunes since dual fuel(for an entirely different reason) and I get the same flutter regardless. If i am not above 70 mph and I get on a steep hill it will flutter and surge a little. This has been the same for all tunes. I assumed it was just part of the deal and either let off the pedal or downshift. The two dual fuel tunes I tired had trans tunes that kept it in gear longer (higher rpm) and this didn’t happen; but it was only due to being in a lower gear. 99% of the time I drive like an old man; so I went with the trans tune that shifted early if I was light on the throttle; it also doesn’t downshift as quick. Trade off for me; I have one bridge I cross on my way to work, if I am less than 70 I down shift. The other option is to spin it higher all the time; not for me. I only mention all this as I’d hate to see you chase your tail, spend several grand with the same outcome. If you want to start with another tune; proven diesel is the tune I ended up with. He made numerous tweaks to get me where I wanted; though I never bothered with this issue as it has been a constant on all tunes. [/QUOTE]

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