I replaced a seal myself and it was out again in a week, so I thought maybe since I didn't have a seal driver I didn't get it in the hub quite right. I took it to a shop to do it again, a month later both wheel seals and the pinion seal are out. I told them to make sure the vent wasn't plugged and the assured me it wasn't. What is making the seals go out? The only thing I have come up with so far is the shop put 80-90 in and I use 75-140 synthetic like ford recommends. It's back at the same shop, they said they will cover the one they did, but if the two fluids mixing caused the seals to go out I'm hoping to get them to cover all of it. If that's not the problem I don't know what is but I'm not going to pay to put all new seals in if they're just going to go out again in a month. The shop has no idea what the problem is and they even called ford to find out, nobody seems to have had this problem before, blowing all three seals in such a short time when one has been replaced twice in the last month
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