Took my first long, hot drive yesterday. I noticed some oil in a radial pattern on the underside of the bed this morning. I know it happened yesterday and hasn’t happened before because I’m a weirdo and look under the truck every time I drive it. I took off the vent tube and it’s clogged, so I think that was the issue. If not, I’ll change the pinion seal. What is the likelihood of built up pressure causing this? Also, what is the likelihood of the pinion seal having been damaged by the pressures?