That truck must have come from up north. I have heard of them rusting and even rumors of a future recall like Tacomas. Nothing for sure yet though. 3rd gen 4runners are kinda hard to come buy. Sometimes you can find a 4th gen for similar money. Axle seals are kind of a weak spot. Ive had to replace both of mine, but mine has 200k on it now. Always look at the rear backing plates on 3rd gens for signs of gear oil. And if the bearing was replaced a lot of people get it back together wrong and a new seal will never fix it until you get the bearing retainer properly installed. I have only seen 1 trans cooler leak on a 4runner and heard of one a T100, but still a very good idea to check.