Only lock the rear. I found it made it alot nicer to drift after doing this mod. Not like it was hard with it not locked but now I can make it drift with more control. But then I really only put 30K silicone in to lock it. It locked it up really good but think it can still break free if under heavy pressure. But for drifting I don't see it getting a heavy load.. I say go for it and see what you think.. Just use something that can be removed if you decide you don't like..