Evening all. So, over the time I have spent here at GTPlanet, it has become apparent that many members here in the drifting community seem to think that the equivalent to a fully locked or 'welded' diff is 5/60/60 (inital/accell/braking). I have always believed however, that 60/60/60 is fully locked. I just took a Nismo 270R around Tsukuba. First with a 60/60/60 diff, then with a 5/60/60. I then loaded these two replays into the data logger, and scrutinised the rear wheel speeds throughout the Lap. At no point did the 60/60/60 show any difference in rear wheel speeds. The 5/60/60 showed up to 2mph difference in speed, on numerous occasions exiting bends. Blue =60/60/60 Pink =5/60/60 Try it yourself if you don't believe me. If you want to run the equivalent of a locked 'welded' diff, run 60/60/60. Have a good night (love the data logger btw!) Edit This thread has some great info in it. Here's a couple of bits from @Ridox2JZGTE and @ITSHAM. Thanks alot for the contributions guys.