I have a stx 550Navara and have had the rear axle seal replaced twice and still have problems with the seal leaking so back to Nissan who tell me that it is the inner seal that is leaking and the whole axle assembly requires replacing. total quote including rear drum brakes and labour was $2900 and I've got them down to $2100. To me this still seems excessive, just wondering what others have been paying for this.