Viscous Coupling rebuilder

[gt4lm]

Hi there ,

i am soon embarking on a 185 gt4 adventure and im looking for a nice model.

This is the first of many questions i will have and its in regards to the Viscous Coupling unit in this model.

I have researched the way they operate and i understand that part of it what i need to know is who can service these Viscous Coupling units with new fluid or goo ? in my research i can see that they are made to be serviceable and will need to have a hole tapped into the housing.

If this is not possible are there replacements available form toyota? i can only guess how much they will cost

any suggestions would be most helpful

[gt4lm]

following up on this i found the information needed from Badnew5 thread