Popping noise...

[06 H3]

On my list of "things to get done before moab" I have to find out what the popping noise is...I have never heard this noise on road and only heard it in 4 low on steep hill climbs...Thinking it may be the Tcase in 4 low I tried to replicate the noise out of 4 low. In 4 hi unlocked I backed up the hill and came back down....at 15 seconds you could hear the pop. What is that?!?

I can confidently say it isnt the lower ball joint seeing I changed it out because I thought that was the pop. This was pre rancho lift also. Worn out halfshaft that hasnt exploded yet? something with the t case? driveshaft? front diff? hmmm....

[video=youtube;445m0eLeGHQ]http://www.youtube.com/watch?v=445m0eLeGHQ&list=HL1330317964&feature=mh_l olz[/video]

 

[06 H3]

If this helps it seems to be coming from the passenger side floorboard. It may not be too distinct on the video but in person (in and out of the truck) its pretty loud and always gives me a "wtf was that?!?" moment...

 

[Zach]

More than likely it is the fork in the transfer case. There is an upgraded fork and collar that will fix it. Craig has had this issue and I heard it Jr3t in Bishop running up Wheeler Ridge.

 

[cbetts]

Yep, sounds like you have the 2006 t-case pop. Mine experienced this twice. It was rebuilt once but the problem came back in a few months so GM replaced the entire t-case. I have heard of several casses of this happening (JR3T, DesertDan, myself).

 

[06 H3]

4:1 upgrade just in time for moab?? :horns:

 

[06 H3]

Do new cases come with the upgrade or am opening up the case to upgrade the fork either way?

I feel like a new one is better in case of a T-case failure I will have this one laying around...I miss warranties

 

[Zach]

A new t case will come with the upgraded fork. I think I have the upgraded fork and collar to fix it in stock. Call me tomorrow Chris

 

[06 H3]

will do, thanks for the quick replies. Will hopefully get this taken care of sooner then later.

 

[MUTAINT]

After watching the video it sounds like either the front diff crossmember bushing is gone or the 4lo gear set is missing a tooth and skipping. Atleast it is easy to check the front diff bushing!

That's my $0.02.

 

[06 H3]

I doubt its the front diff bushing, I had this noise before the rancho lift with bebes bushing set up in and when I put in the rancho kit it comes with a new front diff bushing. It cant be the lower ball joint, replaced it a few hundred miles ago with the rancho lift.

How about the front diff mount bushings? The ones that are mounting the diff to the frame?

 

[H3slate]

A new t case will come with the upgraded fork. I think I have the upgraded fork and collar to fix it in stock. Call me tomorrow Chris

How much of the internals of the t case do you have to take apart? Are there any special tools required?

 

[LagunaH1]

Could it be your torsion bars? Do you feel the pop in the floor of the truck?

 

[06 H3]

Could it be your torsion bars? Do you feel the pop in the floor of the truck?

Could be, and yes it's coming from the passenger front floor. The torsion bar is in that area so you may be right.

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[06 H3]

Yep, sounds like you have the 2006 t-case pop. Mine experienced this twice. It was rebuilt once but the problem came back in a few months so GM replaced the entire t-case. I have heard of several casses of this happening (JR3T, DesertDan, myself).

Did that pop only occur in 4 lo?

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[08H3]

I really don't think it's a drivetrain noise... I'd lean more toward the torsion bar theory.

 

[LagunaH1]

Agreed, if it was a drive train issue, it would repeat itself more constantly as your truck moves.

 

[cbetts]

Did that pop only occur in 4 lo?

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Yep, only in four low. It also happened on flat, smooth pavement.

 

[06 H3]

Maybe I can narrow down where the noise is coming from if im on the outside of the truck. I may try that...

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[06 H3]

Yep, only in four low. It also happened on flat, smooth pavement.

Hmmm...I got that noise in 4 hi unlocked on the video. I tried 4 lo on pavement by stomping on the skinny pedal waiting for the pop but it never happened

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[JR3T]

Loud pop on mine happened about every 25 ft and was only in 4Lo. Good thing 4hi was good, because I had to drive home from Bishop. Dealer tried to rebuild tcase but ultimately had to replace it with a new one to fix it.
Hope your pop is coming from something simple like the UCP or ??

 

[06 H3]

Thanks for all the input guys, What is weird is there is no set distance or amount of times it will pop. The first time I heard it was on a steep climb in 4 lo. Going downhill or on flat dirt I have no pop even if I really punch it in 4 lo 1st gear. Then the other day I went around the block (where the video was taken) to the little natural made RTI ramp, I drove back down and in 4 Hi I heard it. Would the T case make that noise in a gear other then 4 lo? I went back tried it again and videotaped it for this thread. I may go back tomorrow when I have some free time and have my brother drive it down while I try to pinpoint the noise outside of the cab.

I feel I can safely safe it isnt a crossmember bushing or a ball joint seeing those were replaced less then a 1k miles ago. Halfshaft that is worn? T case? Mikkel also brought up a good point, the torsion bar...who knows.

I would bring it to the dealer but cant recreate the pop on road (even in 4 lo on road)

 

[alrock]

When you say 4Hi - is that 4Hi locked or unlocked?

 

[06 H3]

unlocked...In that video I was 4 Hi unlocked.

 

[autumn walker]

I have recently experienced something similar, but on the drivers side. I can actually feel it in the floorboard. I can almost faithfully recreate it with an "aggressive" left-hand turn.

 

[06 H3]

I have recently experienced something similar, but on the drivers side. I can actually feel it in the floorboard. I can almost faithfully recreate it with an "aggressive" left-hand turn.

Hmmm...I wonder if its related to what I have. Does it seem like a suspension noise?

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