I've done it to a lot of diesel trucks used for pulling. I used to just go in there and weld the spiders to each other. A while back I had an older friend of mine tell me to just weld the void inbetween the gears and do it on either side of a gear so there is still some play. I started doing this and never had anyone brake one after that and a guy with no lock outs could still get off the track. Most of the ones I did were D60's and in the front. definitely a cheap alternative but still risky to breakage.