Got some repair estimates and something funny came up..

[LostVegas]

When the VIN on my car (99 e36 m3), it lists the differential as a positraction.

Now, I'm almost certain that all e36 M3's came with limited slips and a positive rear end wasn't even an option. Now my father seems to think that there had to have been an option and it is in fact a positraction rear end, in which I'm arguing that, in the same way that americans call european 4wd AWD, that BMW denotes the cars clutch-type LSD as a positive traction rear end.

Can anyone clear this up for me?

[Rakshas]

Positraction is just a nickname for any Limited Slip Diff.

[jprovence]

Positraction was GM's name for an LSD.

[bimmerrder]

+1 most certainly means the same thing....

[BKarktic328i]

Yep, your good, its the same thing......although you'd think the description was written in the 70's or 80's!

[LostVegas]

That's what I thought, thanks for the clarification.