LBZ: Horrible noise in 4x4

[DuramaxTireSmoker]

I'm working on a 06 LLY. I know the front driver side wheel bearing is bad, and i havent got to replacing it. In 4wheel drive i've got a horrible beating noise starting around 10mph and it grinds so bad it slows the truck down. Do i need a new front differential? I tried a different transfercase and that didn't do it. Could a wheel bearing cause this much noise? I need to do some diagnosing but thought i'd ask your opinions..

 

[Kappa9012]

pull the cover or at the very least the drain plug on the front diff and see what comes out. not sure if engaging 4 wheel drive with the front drive shaft out would help diagnose a bad xfer case or not.

 

[DuramaxTireSmoker]

I already replaced the t'case so its got to be something else

 

[S Phinney]

Hubs can make some terrible noises. I bought a truck from a guy and I wouldn't complete the deal until I changed the hub because it was that hard to believe it was the hub that was making that noise.

Sent from my DROID RAZR using Tapatalk 2

 

[DuramaxTireSmoker]

when i move the front driveshaft, it is very wobbly at the front part where it attaches to the differential, so i'm suspecting i need a new front diff.

 

[ryan415]

Sounds like you lost a pinion bearing. Gonna have to drop and split the diff in half. They're pretty easy to rebuild

 

[blk smoke lb7]

Sounds like you lost a pinion bearing. Gonna have to drop and split the diff in half. They're pretty easy to rebuild

X2

 

[DuramaxTireSmoker]

Thanks guys.. so this is whats causing all the horrible noises? Just wanting to make sure..

 

[ryan415]

I belive so. There should be no movement in the front yoke other than rotational obviously. lol Definately sounds like you're gonna need some bearings and gears

 

[TNRGreene]

Blaine I have half of a front end here. The 1/2 you need with the pinion & gears

 

[DuramaxTireSmoker]

found one at a salvage yard but thanks Todd.

What's the trick to removing it? I have all the bolts out but I don't see how its gonna come out. Do I need to remove the centerlink?

 

[TNRGreene]

cv's un bolt
1 top bolt
1 back bolt
unbolt driveshaft
2 bolts on pass side axle tube.
unplug actuator
pull off vent hose
done

 

[TNRGreene]

did you buy the cv's from the junkyard?

 

[DuramaxTireSmoker]

cv's un bolt
1 top bolt
1 back bolt
unbolt driveshaft
2 bolts on pass side axle tube.
unplug actuator
pull off vent hose
done

I did all that and i dont see how its gonna slide out of there..

did you buy the cv's from the junkyard?

no just the diff..

 

[TNRGreene]

Is your truck lifted?

 

[DuramaxTireSmoker]

keys cranked all the way. thats it.

 

[TNRGreene]

THe bushings get tight but we just did one today.

 

[DuramaxTireSmoker]

What should i slide down first? the front or the back.