Recently acquired a 1988 ex army 110 with only 9k miles. Chassis is as near to mint as you can get - still has all the original paint on it and no rust! Had to change a front wheel yesterday, jacked it under the front diff with a block of wood on top of the plate for protection but soon had oil dribbling out of the diff. Noticed a lump of what appears to be Chemical Metal about 10mm had fallen from a hole in base of the diff pan. Initial thoughts were - drain the diff and repair with new chemical metal / cut the diff pan off and weld on a new one. Any thoughts/similar experiences? Thanks in advance