I know Turbo Dave can do it. However, you should be extremely cautious with a welded diff b/c if you break an axle you are looking at a big time problem. If you are doing a freeway run at 100 mph and have one axle break you are going to be doing 360's down the road. I wouldn't run a welded diff unless it was a track only car. Doing it on a street car is risky. Good luck, contact Mainstream if you have any questions about it.