strange sound

[pokethesmot]

i went to go mud bogging today and wen i finly got out there i went to lock in and as soon as i got locked in and moving it sounded like a pair of dice under my truck it only happens when my hubs are locked in it can even be in 2wd and it will do that

[old Rusty C10]

sounds like the hubs are bad but you may wanna ask this on the 4X4 section for a better response....so ill move it for you

[pokethesmot]

wait its the transfer case i think cuz i unlocked the hubs a little bit ago and drove it in 4lo across the yard and it made that sound

[dammitmitchell]

do you have fluid in the front differential brother?

[pokethesmot]

yeah but it smelt terible

[sierra4x4]

Have you checked all your U-joints on the front driveshaft and the axle joints?

[dammitmitchell]

i would pull the cover and take the front off the ground so that you can actually rotate the wheels by hand with the diff open..
also you can spin the input shaft (front) by hand with the truck in neutral (to disengage the tranny from the loop, and prefferably with the rear tires off the ground also) to completely isolate the "noise"
just my 2 cents... that's what i did to isolate wether or not i shattered my last axle or destroyed my x-fer case..
then the second axle i destroyed i saw and heard the front u joint fly out the front of the truck and dissapear into mud..

good luck.. and be patient... "troubleshooting" is where you will truly learn your truck..

[pokethesmot]

i have one tire thats wider then the others in the rear could this be it and i gues ile start truble shooting asoon as it stops raining

[dammitmitchell]

no dude the tire width will not make a difference it is the tire height that will f-things up
ya gotta get the truck off the ground (in my opinion) to figgure out where the noise is originating from...
good luck

[pokethesmot]

ok so here it is so far the u joint looks good i even greased it.....and the sound happens when the hubs are locked and and it makes it extremely loud when 4wd is locked in its like a clicking and popping sound...any ideas

[Chevy1TonFun]

did you pull the diff covers yet. Wheres the sound front, center, or rear?

[pokethesmot]

it feels like its under the floor bored so im guessing its from the center

[pokethesmot]

ok i figured out the sound now i just need some help figuring how to fix it i think the front drive shaft is hitting something cuz when i spin it it knock but up i push it up a little bit and spin it it sounds just fine i think its hitting the metal plate under my transfer case

[dammitmitchell]

your truck should not have enough lift to cause .. i would check the cross over for your exhaust that is a common mistake there..
by cross over i mean where the pipes go under your tranny etc....

[pokethesmot]

if ur talkin about an h pipe i dont have one lol

[dammitmitchell]

no dude it's the cross over..
do you have true duals..?
or do you have both exhaust manifolds going into one pipe then with a dual pipe exiting? (this one is more common of the two set ups)

[pokethesmot]

naw i got true duals i had to redo most of it myself the end right behind the had with some turndowns

[dammitmitchell]

dude re read that for me bro.. i have no idea what you are talking about..
he he he ...
well f your front axle or any axle is hitting anywhere you are going to have a "ring" cut into that axle...
have you pulled your differential covers yet?....
because a bag of rocks.. or a hand fll of dice.. to me.. sounds like issues in the diff..

[pokethesmot]

Originally Posted by dammitmitchell

dude re read that for me bro.. i have no idea what you are talking about..
he he he ...
well f your front axle or any axle is hitting anywhere you are going to have a "ring" cut into that axle...
have you pulled your differential covers yet?....
because a bag of rocks.. or a hand fll of dice.. to me.. sounds like issues in the diff..

my axle aint hitten nuthen its my front drive shaft right where it hooks up to the transfer case

[dammitmitchell]

my bad.. just swap the words.. "axle" and drive shaft..
that's what i meant.. check the shaft..
sorry dude.. im freakin tired...

[pokethesmot]

well i wrapped were i suspect it was hitting in a papper towel and spun the drive shaft and it silenced it a bit but its such a tight fit i cant really see if there is ring cut into it

[dammitmitchell]

hey dude check the u joint also.... it can be just finally bad.. etc.. but honestly.. man get in there and poke around.. you might actually have to get a little dirty...
it'll be good for you and give you character" or what not..

[pokethesmot]

lol man i stay dirty when it comes to my truck..i was coverd in greas from trying to figure out why my 4wd was clunking...hell i had to take a shower in gojo lmao but how would i go about chekin the u joint...cuz they look fine

[Eturnit3]

you should be able to grab the driveshaft near the ujoint and push to each side of the joint with no movement. I just had a similar problem myself with front drive shaft. My Driveshaft has 3 ujoints, a centering yoke an "H" yoke and weld yoke (which is closest to the main length of the shaft). Might be worth pulling the front driveline to see if everything is ok. My problem was in my centering yoke/"H"yoke.

[dammitmitchell]

wiggle it dude.. gotta chec and see if they wiggle too much.. then they should be the "cap style" with two bolts and a strap for the "caps" to attach them to the pinion gear (front diff)
dont be scared to grab it and man handle it.. jsut dont hit it with anything because a dent or damage can cause a throw off in the balance..
but dude.. i would start from scratch and lift all 4 tires off the ground and then spin everything while the x-fer case is engaged and the trans is in neutral...
that way you can tell where the noise is coming from..

and suspension can take a "noise" and move it frrom the axle to below your but because it's all bolted together...