There are times when i do use 4wd on dry pavement, such as trying to pull the boat out of the boat ramp and turning. But as for today, there was a good layer of snow on the ground and i kept getting close to the locking but it didn't lock, just you could tell something was going on. Since i'm kinda in setting of getting a new rear dif, would it be wise to get a new front dif as well, something more reliable and durable?