Install 3.23 Differential

Summary

Install a 3.23 Limited Slip Differential to increase top speed.

Start Date: July 18, 2012

Odometer: 309,000 km

Total cost: $2

After replacing my failed M50 engine and transmission, I drove my car and discovered that the gear ratio of the existing 4.10 Limited Slip Differential was causing the car to hit the RPM red line at approximately 140km/h in 5th gear. Average track speeds at the tracks I drive are in the range of 160km/h to 220km/h, so the 4.10 differential was completely unusable. I decided to replace it with a 3.23 LSD from a 2000 M Roadster that had been on my previous E30.

Parts