Outer Limits 4x4 Board

Was out having a play in my Grand Cherokee the other day and noticed
the varilocks are getting a little lazy , so checked the oil in the diffs, was a little low so replaced it with some new nulon 80-140 synthetic limo specific fluid ($100 worth). Diffs are Dana44a and Dana30

And got to thinking about the way these things operate, they use a gyrotor
Pump , the spining axle pumps pressure to a clutch pack providing the lsd function, the problem is the amount of spin required to cause the action to
take place is a bit above what i really like.

Question for the hydraulic gurus is would the viscosity of the oil change the pressure biuld up , I doubt there would be a difference in pressure achieved but maybe a difference in the time it takes to achieve the pressure.?

it's probably a lose/lose situation. thinner oil will flow more quickly and achieve quicker lockup however it will also bypass seals more easily and the maximum lock up effect available my be less. I'd stick with the manufacturers recommendation for that one. thicker oil won't flow as easily and may result in cavitation and delayed operation

dumbdunce wrote:it's probably a lose/lose situation. thinner oil will flow more quickly and achieve quicker lockup however it will also bypass seals more easily and the maximum lock up effect available my be less. I'd stick with the manufacturers recommendation for that one. thicker oil won't flow as easily and may result in cavitation and delayed operation

Pretty much what i was thinking would be the case.
might pull one apart and see if i can change the ramping ,friction plate combination or somthing thanks for the input