Flapping sound

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Remery514

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I have a 2010 Tahoe that makes a fluttering sound only in 6th gear. doesn't do it when coasting or accelerating, only does it when your at a constant speed and only in 6th gear. Anyone have any insite on this it would be greatly appreciated
 

PG01

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I have a 2010 Tahoe that makes a fluttering sound only in 6th gear. doesn't do it when coasting or accelerating, only does it when your at a constant speed and only in 6th gear. Anyone have any insite on this it would be greatly appreciated
that’s AFM... next time you are driving change the dic screen to the average mpg screen... the one that shows a v8 in the corner and see if it goes to v4 when you hear/feel your flutter
 

OR VietVet

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Welcome to the forum Roger.


We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.


If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.
 
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Remery514

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that’s AFM... next time you are driving change the dic screen to the average mpg screen... the one that shows a v8 in the corner and see if it goes to v4 when you hear/feel your flutter
That is exactly when it happens, Thank you so much. I take it the only way to stop it is to delete the AFM?
 

Joseph Garcia

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Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives.
 

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