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2G Identifying an LSD by wheel turning

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dfootedsm

Proven Member
269
20
Jun 3, 2013
Botswana, Australia
How do I know if my differential is Open or LSD without opening it? I had heard if you spin the wheel and the opposite wheel turns the opposite direction it is LSD, I have heard if it spins the same direction it is LSD . Im confused and would like to figure this out as I am putting my DSM together from a collage of vehicles and I want the LSD for the best hookup.

Vehicle number 1 :
Rear differential is disconnected from the driveshaft. I spin a tire and the opposite tire turns in the same direction . What Differential is this and why ?

Vehicle 2:
Rear differential is connected to driveshaft in neutral I believe . I spin a rear wheel and the opposite tire spins in the opposite direction. What differential is this and why?

I have heard too many explanations from different forums , however I would like a car specific definition since Im putting together a DSM and not a Miata or a AWD Astrovan
 
That doesn't seem to be the case with the factory Viscus LSD.
On all of the 3 that I had, if I turned one wheel, the other turned in the opposite direction. I read that they don't lock until you push them so hard that the silicone fluid heats up.
 
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