from 3.73 LSD + open 3.45 to 3.45 LSD

[Vincenze]

How was drivability with 3.45s and M42? Someone swapped LSD out of my 91' for open diff so I want to swap the LSD back in. I found a complete diff out of Z3 but it has 3.45s. My stock gears are suppose to be 4.10s. I have no idea what's in there now other than it's open diff. I am guessing not 4.10s. Was that M42 a dog off the line with 3.45s?

You can use a gearing calculator. You enter different differential ratios, and the calculator will show RPMs for all gears.
Then, you'll be able to compare to your current gears.

http://diffsonline.com/images/GearingCalculator.xls

[bignslow]

You can use a gearing calculator. You enter different differential ratios, and the calculator will show RPMs for all gears.
Then, you'll be able to compare to your current gears.

http://diffsonline.com/images/GearingCalculator.xls

I know I can theorize what it will drive like. I was looking for a real world experience.