I own a 1991 wrangler 5 speed 4.0 straight 6. My 4 wheel drive was slipping in and out. The indicator on the dashboard indicated it as well as the popping/metal clashing sound that it would make when slipping in and out. Believed the problem was the actuator, replaced it. Not slipping as much, certainly a difference in driveing, but still slipping occasionly and making a chattering noise while driving. This chattering can be heard while going straight or turning. If anyone has any advice i would greatly appreciate it.