Hey guys,
K20 1982 3/4 ton 6.2 v8 diesel
Decided to change oil in diffs today. Only had time to do rear.
Despite being careful the gasket tore and jt leaked. So silicone and now she's drying up.
Onto the question... my rear diffs fill plug, it has a narrow 1/4 " diameter tube about 2 inches...