Thanks for the comments. I think I will be pushing the button on this within the next few weeks. I will let you know what I think when I have had a play. In my 135i with over 400BHP it helped but the torque in the diesel is soo much greater, so I hope it gets hold of that alot better than without the LSD.
Oh yes, I only have traction contol on in the wet. When it's dry it completely off all the time
335d MSport Coupe LCI:- 19" Apex EC-7's (8.5j ET35/9.5j ET33) Factory fitted Sunroof, BMW Perf Carbon Fibre:- Boot Spoiler, Mirrors & Front Lip Splitter, SSDD Carbon Fibre Rear Diffuser, Roof Spoiler, Black Kidney Grills, Red Calpiers, CKS Custom Exhaust, Wagner FMIC, ITG Air Filter, Sprint Booster, Quaife LSD, Weicher front & rear strut brace, Forge charge pipe