Tick from rear wheel area

[Da_Gorilla]

Hey everyone just got a new 18’ z71 has the 5.3. Other then the 70mph shake and clunky transmission I have a ticking noise from the rear wheel area. At least that’s where it sounds like it’s coming from. Doesn’t really happen lower then 30mph but once your above that it is a lot louder. Next to a wall or another car you can hear it very loudly. Took it in for the hard shifts, vibration and the noise. They of course said the trans is learning and then said the tick is my key chain I laughed and said I will drive it till it breaks. It’s more annoying then anything. It sounds like a rock is stuck in the tire which it isn’t. But that’s the closest thing I can tell you as to what it sounds like. Any help with this as the tech wasn’t very helpful!!

[HeySkippyDog]

How frequently do you hear the tick?

The flapper for your V4 mode is in the tailpipe in the area of your passenger rear well. It restricts the pipe so you don't sound like a Honda with a needlessly oversized exhaust in V4 mode.

I know a guy who changed his muffler and had them cut the flapper since it does reduce your V8 tone even when open... He regretted it instantly. If you have it removed, have a range device or a tune to disable V4.

They are known to be audible and make a click that gradually becomes a little squeak as time wears on.

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[HeySkippyDog]

Lower in speed, say 30 mph you will stay in V8 mode. At higher speeds depending on demand it will switch between V4 and V8 as needed.

Shift to L5 (pull the shifter past D to L, then press the + button until you have L5. This will reduce available gears to only 1-5 AND it stays in V8. Try it and see if the sound goes away. I think it's probably that.

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[Da_Gorilla]

It happens in both v8 and v4

[HeySkippyDog]

It happens in both v8 and v4

Are you sure?

Seriously, try L5 for a day and listen for it. I am not there to hear but I sincerely believe it's the flapper.

Check your spare tire, make sure it's winched up tight. Then be sure the spare tire tools are secured tight.

The only other "rear end clicking noise" I'm familiar with is a rear end about to let go, but you said it's a new truck.

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[PMurray]

Do you have a (fabric) box cover? If I forget to fasten down the tie down strap clips they will "click" against the rear window. With either a dble or crew cab the noise sounds further back than it is.

[Da_Gorilla]

No box cover.  Tried the above method and happens in both v8 and v4. At speed it is consistent. Not intermittent like a flapper. Sounds like a rock in the tire with consistency. 

[HeySkippyDog]

So you tried driving in L5 and waiting for noise?

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[Da_Gorilla]

Yes tried in l5 and noise is still there. Going to be changing exhaust today and will see. But it sounds like it’s from the wheel somewhere. Not to sure.