02-13-2015, 10:19 PM
Join Date: Oct 2008
Location: Independence, MO
It could be something as simple as the viscous coupling of the hubs to the birfield shafts caused by over-lubrication of the new hubs.
...Which bring me to another point - Did you install or see the hubs get installed?
A common mistake in installing locking hubs is to over-grease the insides of the units - packing them full of axle grease.
Doing that creates two problems:
1. The extra grease reduces the amount of space the coupling mechanism has to work in.
B. Because the extra grease is so thick, it causes rotational motion to be transferred from the wheel to the birfield shafts - commonly called viscous coupling.
Admittedly, the viscous coupling is so weak that you can probably grab hold of the driveshaft and stop it's rotation if you could somehow reach for it. This makes it not a really big problem.
But the heavy packing of grease is not really helping things inside the locking hub.
The internal moving parts should only be lightly coated with a silicone grease to lubricate surfaces in contact with other surfaces AND to reduce corrosion should the hubs get immersed in water.
I hope you saved your Asin hubs. Nine time out of ten, they only need a good cleaning to get them back into service. Do a search for locking hubs at Ack's FAQ (see link in signature, below) to find a rebuilding guide.
I hope that this helps!
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