Front end noises

[Hummerboy]

I've poked around on the forum and think this noise may be my front drive shaft? The first video is me turning the front driveshaft when the hummer is in park... I don't know if this noise is normal or if it's supposed to spin while in park. The second video is the actual noise while in 4hi lock. I thought it was my dif because before it only happend when I had to push the gas a little on a hill or something. It doesn't do it all the time on road but in 4wd it seems to make the noise a lot more.

 

[Hummerboy]

https://vimeo.com/129128559


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[Hummerboy]

https://vimeo.com/129130338


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[Ghostbuster]

Doesn't sound good... :sigh:

 

[4speedfunk]

Pull the front driveshaft out and see if the CV boot (on the rear end) is ripped. Rancho kits run the boot at an increased angle, and when the boot rips, the CV runs dry and it can make that noise. You can shine a flashlight up in there and see if the boot is ripped.

 

[Hummerboy]

Pull the front driveshaft out and see if the CV boot (on the rear end) is ripped. Rancho kits run the boot at an increased angle, and when the boot rips, the CV runs dry and it can make that noise. You can shine a flashlight up in there and see if the boot is ripped.

So I crawled under there and this is what I'm seeing... There is some black oil looking stuff under there on that black bar(could be the torsion bars) that I included in a pic.. The shaft at the end that connects to the transfer case is not flat against t case it's kinda hard to tell in picture but it's pulled out a little,not sure if this is normal or not


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[4speedfunk]

That looks fairly normal. Boot appears to be intact but, you can see the rather steep angle that the Rancho puts on that joint. Have you tried removing the front driveshaft and going for a drive without it? (you'll have to use 4HI-Lock to go anywhere). This can sometimes isolate noises and let you know if its the shaft, t-case, or front axle that's making the racket. It only takes ten minutes to pull the shaft...(4) 10mm bolts at the t-case flange, and (4) 7/16" bolts at the front axle yoke.

WARNING...YOUR TRUCK CAN ROLL IF PARKED ON A HILL WITHOUT A FRONT DRIVESHAFT (EVEN IN PARK).

 

[Hummerboy]

I never knew that the rancho did that until now I will pull it and see what happens


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[Hummerboy]

That looks fairly normal. Boot appears to be intact but, you can see the rather steep angle that the Rancho puts on that joint. Have you tried removing the front driveshaft and going for a drive without it? (you'll have to use 4HI-Lock to go anywhere). This can sometimes isolate noises and let you know if its the shaft, t-case, or front axle that's making the racket. It only takes ten minutes to pull the shaft...(4) 10mm bolts at the t-case flange, and (4) 7/16" bolts at the front axle yoke.

WARNING...YOUR TRUCK CAN ROLL IF PARKED ON A HILL WITHOUT A FRONT DRIVESHAFT (EVEN IN PARK).

is this normal? Its wet so fresh leakage... I'm trying to get the bolts out but as I'm twisting the shaft is rotating as well, my wrench is hitting the t case skid


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[4speedfunk]

I use a 3/8" ratchet and a real long wobble extension with a 10mm socket. A little seal ooze is normal above 75k. Drain the t-case fluid and see what it looks like.

 

[cgalpha08]

Take put the bolts that connect the drives haft to the tcase first. Then the ones that hold it to the front diff. If you do this with the tires on the ground, it'll keep things from spinning.

 

[alrock]

I'll second draining the t-case and check the fluid. That noise sounds transfer case -ish to me.