When to my mates the other day who run a breakers. While there they happened to mention they had just taken an LSD off a car.
Having just bought 8 tyres that morning money wasn't flowing as such but I offered £100 jokingly and they accepted so I couldn't refuse.
The diff seems nice and tight and so a deal was struck. Now I assumed it was a 3.91 LSD which will be going on my track car (318is).
However after picking it up I don't think it is. Turning the propshaft end of the diff it takes just over 4 turns for one wheel rotation. So it could be a 4.1LSD which would be a right result for me.
But are there any other ratios it could be (I believe it came off a 320).
Also where is the plate I can check the part number on? I have looked at it but can't see anything obvious stamped anywhere.

