WHILE PULLING OUR BOAT OUT FROM BOAT RAMP IN 4LO AND A LOUD NOISE CAME FROM DIFF. WHEN I ARRIVE HOME 25MIN LATER IN THE DRIVE WAY I NOTICED GEAR OIL FROM PASSENGER SIDE. UNDER TRUCK I NOTICED WHERE LEAK WAS COMING FROM AND PUSHED THE AXLE BACK AND IT STOPPED LEAKING. I DRAINED AND REMOVED SHAFT ASSEMBLY SIDE DIFF AND REPLACE SEAL AND REFILLED GEAR OIL. ON THE NEXT TRIP WE NOTICED GEAR OIL LEAK CAME HOME DID RESEARCH AND NOTICED THIS IS KNOWN PROBLEM PURCHASED THE CIRCLIP THINKING THAT WAS THE PROBLEM BUT AFTER LAST NIGHT NOTICED THE SHAFT BROKE WHERE THE CIRCLIP WAS SUPPOSE TO BE. LOOKED DOWN THE DIFF HOUSING AND NOTICED THE OTHER PIECE OF THE SHAFT NUB STUCK INSIDE. ESTIMATE $2500 FOR DIFF REPLACEMENT TO 38500-8S112B OR $825 TO REPLACE SHAFT AND GEAR. 3RD TIME I'VE EVER USED 4 WHEEL DRIVE!!!! *TR