I went to yank a boat out of the water for a friend & it was only spinning one wheel in the sea weed. Is the limited slip covered under the 7-70 warranty??????
The way the diff is designed, both wheels need to have some traction. It is a Torsen-type design. There are no clutches, so if no friction is applied to both wheels, no power gets to the ground.
Best way to get both wheels to spin is to apply the parking brake, or use both feet. Seems counterintuitive, but it works.