[eggman51]

My budget has been a bit destroyed with the global pandemic. I have to defer a couple of things, but think I can fit in a 4.10 gearing change.

I will do this through Diffsonline as that is the diff specialist my shop deals with.

My 2006 Z4MR car has 55,000 miles on it. It's a daily driver, but I plan to track it >10 days per year under normal circumstances. I may convert it to a dedicated track car in the medium to far future.

I have thought of:
- ring and pinion only
- Diffsonline 2 clutch diff w tweaked ramps
- Diffsonline 3 clutch diff w tweaked ramps

While I have read about other diff technologies, it seems like the clutch pack diffs are a proven solution for a street / track car.

I'd appreciate any wisdom from this community on LSD / Diff / Differential options.

Cheers,
Eamonn