as stated in other posts -- sure grip will be junk ----
just for the record ,,, it has nothing to do with the cones bottoming out in the case and then the spider gears " spin all the time " --spider gears are in constant mesh with the side gears and they do spin all the time or you would not have a working differential --
it is strictly a lack of lubrication which seizes the spider gears to the cross shaft which breaks the 1/4 inch locating pin for the cross shaft and then rotates the whole shaft wearing into the case .or in a worse case scenario the pin works its way out and locks up the diff destroying it completely.
