Help with Differential Markings

[Staszek]

Hi I have this 3.73 E30 LSD, at least I think it is. I want to confirm but the tag is gone. I know the S is there already for LSD, but can I tell from these markings?

[george graves]

I've never done it....but they say if you spin one output the other output will spin the same direction on a LSD. On a open diff, they will spin opposite.

[Staszek]

I've never done it....but they say if you spin one output the other output will spin the same direction on a LSD. On a open diff, they will spin opposite.

Its definetly an LSD, they both spin same direction and also has the big S on the bottom that designates the LSD, I am just trying to figure out if its really a 3.73.

[george graves]

Turn it and measure. The input should turn 3.73 times (round up to 3 and 3/4 times) to one revolution of the output. Put some parks, or use some blocks of wood as reference marks if you need to.