About 2 months ago I noticed some differential oil on the front half of my rear differential cover and could see oil coming from the flange of the pinion. I suspected the pinion seal so I took it to a local transmission shop and they did indeed find the pinion seal to be bad, so they replaced for a couple hundred bucks. I drove the truck for a week or so and was still noticing a little drip forming in the flange about e er 4th day of driving, so I took it back and they had it for near 4 days driving it and checking the leak, they assured me it wasn't leaking and it could have been residual oil left inside the flange from the Initial fix. So since then I've been checking it about once a week and haven't noticed any leak.....until today when I pulled my 18 foot Jon boat about 6 miles to a fishing hole and back. I decided to check and sure enough, oil on my differential cover, noticeable oil coming from the pinion. I'm really tired of messing with this. What could be the problem? Clogged axle vent? How do I check it to see if it's clear? Thanks for the input.
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