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Originally Posted by ToyotaObsession
That's what a VLSD is. It's a very thick fluid that allows a little bit of slippage, but once starts to turn too much the fluid starts to act like glue to transfer more torque to it.
Very inefficient as it's easy to overcome the fluid.
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Ok, obvious you didn't click my link, nor read the information. And obviously you are really really unaware of what LSD's Toyota uses, because it is NOT a viscous LSD. Infact I'm pretty sure Toyota has never used viscous in any of their cars.
I know for a -fact- I'm right on the separate chamber bit. There is a completely different chamber inside the differential unit, full of silicone fluid, that acts as the "LSD" part of a viscous diff. The drain/refill plugs are for the normal gear oil ONLY. You can't drain, nor change, the silicone fluid. Viscous differentials are not like mechanical differentials. In a viscous LSD you don't have to put any LSD additive in the regular gear oil, as the oil in that area is effectively lubricating a normal differential. LSD additives are for adding friction across the clutches.
Quote:
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Originally Posted by Dimman
Not exactly, it starts off thin, and gets thicker as it heats up. The thicker it gets the more difficult it is to flow and the more engagement happens.
I've never driven one, but I've heard they don't engage progressively. Kind of do nothing, then 'turn on'. Like it's a squared relation instead of linear or something.
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Yeah, basically the LSD doesn't work until slippage has already occured. It has to be 'activated' I guess in this sense, unlike a mechanical LSD, like a clutch type, that basically can lock once acceleration / braking is applied.