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When they are welded they have to be welded with the welder running very very hot. You want to weld the spider gears inside to one another. When you weld them I always burn all the teeth off of them not just weld them together but elimenate all the teeth. Once the teeth are gone start welding them up first filling in between the teeth until they come out even with the top of whats left of the spider gears. Once that is done I start welding them all the way around over and over to ensure they cannot and will not break loose. If the room allows I also weld them to the carrier so it pulls some of the pressure from the internals. Make very sure you dont get the gears to hot or it will be a biotch to turn. Only weld them with a stick welder a mig is not going to do it right. Make sure you get all of the slag out before running it. generally you have to drive the axles in and out a few times to get the burr's out of the splines. Again do not get it to hot or it will not act right. I recommend only burning about 3 rods max then let it cool down a while. Most of the welded spiders that bust are only welded in the corners. Some of them are welded better but the quality of the weld itself is poor. Make sure there are no teeth left on the spiders and the build up is about where the teeth would go out to. If you have any questions PM me.
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