I have just sleeved the tail shaft spigot and added a new seal to hopefully stop the perennial oil leak and in the process the diff specialist here in Perth expressed great surprise that there is no breather hole, pipe , vent or similar anywhere on the diff assembly. He can't recall this feature on any other vehicle and whilst saying there must be a reason for this , he can't think what it may be.
Anyone know why an 87 4/4 with a Salisbury diff might be this way or if indeed it is a more widespread feature ?
