I put in the center diff lock it made a huge difference on the take off its much faster and if i nail it off the start it over on its roof. But from what i have read it puts more strain on the drive train. I might take it back out and go with a heavy diff oil like 120000 weigt. I got the day off today gonna see what i can do for my 3rd gear i cant get it to shift into 3rd and had the screws out to the point where they would hit the ring. I saw a post about useing 2 washers to space the clutches out a little more i think im gonna try changing the springs.