G`day Caravanman, no I hav`nt replaced seal yet. Have had operation on my left hand 3 months ago and are having problems with it. Hope to be back in action soon and replace it then, can`t see it being a big job, cant see how a mechanic would be able to charge that much for a 1 hour job. regards Slimbo1942Cant see why replacing an Oil Seal should cost so much.
Mine has just gone, hopefully having it replaced next Wednesday by an Independent Garage.
Don't know how much yet, but if they quote anywhere near a £1000 I will do it myself.
Looking at the manual it looks a straightforward job, shouldn't take more than an hour.
'Slimbo 1942' did you have any problems?
FWIW (for what its worth).
About a year after I got my new Terracan, It was serviced under warranty for an oil leak from the rear differential seal (the same one you are talking about).
I remember well, such service took full 3 days at the shop. Since the shop manager was a good friend, he allowed me to "peek" every once in a while, the repair procedure.
Following factory service manuals, the rear differential was removed and the main pinion had to be removed too. The seal was replaced and the whole thing put back together, but it needed all sorts of adjustments for backlash play, etc.
I asked why that seal could not be replaced from the outside, and the mechanic told me that no matter how carefull you are, you cannot put in the new seal without damaging it again, if the main pinion is not removed. The seal had to go in first, then the pinion assembly. If trying to replace the seal with the pinion in place, it could be done, but the inner surface of the seal (the one that touches the pinion shaft) will be damaged. I am no mechanic, but from reading the service manual section on this (see attachment) I can easily discover this is no "home or sunday mechanic" procedure. You need special tools and knowledge to do this (besides the service manual).
Today, 6 years later and about 100,000 kms after, no oil leak has showed from the rear differential (seal or whatever), so, I guess it was done right. Considering this labor was done under warranty, my Hyundai shop could have cut costs by simply replacing the seal without disassembling the differential, but I guess they knew that if they did it that way, my car was more likely to return with the same problem.
I am including the service manual section for the rear differential.