[Gator67]

I have a new Strange center section installed in a car, and I can't remember whether I went with their 31 spline clutch differential or TrueTrack. I bought it in 2016 and have no invoice and the vendor records don't go back that far. I only thought about this because I have to decide whether to add friction modifier--Strange says not to use friction modifier with TrueTrack...but needed with the clutch style. Is there a way to tell what I have without pulling the center section?