Viscous Coupling woes

[Rangie]

Hi All

I was just wondering if anybody has come across this with a P38 RR.
My viscous coupling does not appear to engage properly as I do not get a 50/50 split to the front and back axles in low range. The unit is supposed to be sealed and does not require any servicing of any kind. Apart from a costly replacement is there known fix to this?
Thanks for any ideas

 

[joey]

I might be wrong on this, but I didn't think the viscous coupling was a true 50/50 split... it is kind of like an open diff with heavy oil in it. So it will provide power to both ends, but if one slips it will still get more power to the slipping end.