Check this link out,to see diagram,click on blue view info icon.
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SOURCE: 2003 chevy suburban front axle noise
Worn side bearings is where the noise is coming from and might as well do both sides, I used replace them in about 2-4 hours, depending on where Murphy happened to be. Disconnect both side inner CV joint, front prop shaft and the 4X4 actuator line. If you want to drop the front pumpken. Not sure if you have enough room if you want to change the bearing without removing the pumpken from the frame. You should see when you disconnect the CV shaft.
The front diffs are toys compared to the rear, if you use auto4wd too much there are bearings in your tranfer case that are similar to the side bearings in the front diff. In both appearance and durability and soon you'll replace those too.
Good luck and keep me posted.
SOURCE: moaning noise
has anyone checked the front drive shaft u joints, play in the differentials? differentials would come and go as you accelerated and let off.
SOURCE: 96 chevy blazer rear axle bearing/seal r/r
No. Did you run some emery cloth along the race (bearing surface) to make sure it was smooth and clean? If you leave any part of the old seal or debris on the hub surface, damage the seal when installing it, not liberally packing the bearing with grease or the seal did not seat right you can have issues like yours. Make sure the seal is installed flush and if everything looked good as far as the axle and surfaces, pack more grease in the bearing. When you think there is enough grease in it, put more in. Put the grease in the palm of your hand and with the bearing held flat in the other hand repeatedly tap the bearing on your palm until grease comes out both sides. Then put more on it when you seat it.
Adjustment
The wheel bearings on these vehicles are not adjustable. If the bearings become loose or make noise, they must be replaced.
Removal & Installation
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Thanks to a buddy of mine, he created a spacer in his machine shop. now attempting the "simple" task of replacing seals & bearings on the left side. instructions state to use a slide hammer or pry the output shaft to separate it from the carrier. THIS SHAFT AINT MOVING FOR NOTHING ! i HAVE THE CARRIER OUT ON THE BENCH STILL WITH NO LUCK, ANY SUGGESTIONS?
In a last ditch effort we hit that slide hammer with everything we got, & finally the output shaft came loose. I still can't understand how the guy on you tube did it with his little "lady" hammer.
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