So my truck is still in the process of being painted.. but just before i tore it down i started hearing noise. it started at low speeds and sometimes went away, other times it did not. I added gear oil but it only took about 2 pumps then started spilling out. the noise went away for a day, then got worse.. again i added oil and it was fine. except the second time it took more. I noticed gear oil everywhere underneath the bed. which looks like it is leaking with a force..
I checked the vent and its all clear.. any ideas guys?