2017 Peace, mercy, and blessings of God be upon you. For sale or trade. LSD 3.90 LSD 3.90 LSD 3.90 A differential that fits 2015 and up Mopar cars. Its ratio is 3.90, for a manual transmission Challenger, not 3.09. The differential is better for performance, it "pinches" and adds horsepower. Whoever wants to benefit from it, I have it, and I accept trading it for a 3.09 differential for an SRT.