A 310R has the limited slip dif and the same setup on my 7, ( LSD, 5 speed, Sigma.) is also noisy, worse in 4th,rattly and awkward to drive smoothly with lots of back slap if you are not careful. My 5 speed is also difficult to get into 2nd when cold and much better when warmed up. They all do that and I reckon it's part of the character and the fun.