Hi, chain won't slip it's a fuking strong chain , it will try and run back up the sprocket a few teeth insted of running off the bottom then jump off with a bang, same as a slack chain on a push bike, that's in 4 wheel drive, in 2 wheel drive you may have a ticking noise coming from the t/c as the chain taps the inside of the case due to it being stretched, you can test the chain through the drain plug you can just see the chain flick it with a small screw driver if it hits the t/c housing it's stretched. hope this helps.............