Modifying &/or Rebuilding Viscous Coupling Unit

[Willard]

G'day all,
Does anyone have any experience in modifying or rebuilding VCU's? Can it be done, and if so, what is the process?

For example, is there a way to "tighten" up the standard VCU in the centre diff to be more like a Ralliart item, etc.?

Here's a pic inside one:



Cheers,
Chris

 

[bazeng]

Dougmo has upgraded his viscous in the front diff I believe.

It requires changing the fluid to a thicker type.

I guess you could try that, drill out the ball bearing and drain the fluid and refill with the ralliart fluid...

 

[DOUGMO]

i have upgraded the front diff but dont think you can do the same with the vcu though. i would only go for a ralliart vcu for gravel work though

 

[Willard]

Ah, OK...thanks Dougmo.

Why only gravel for the Ralliart VCU? My assumption is that it would send more drive to the rear wheels when pushed? Or would this make it far too tail happy?

 

[DOUGMO]

other way round, more even spread of power to all 4 wheels which can cause more understeer on tarmac