Is there a seal for the front diff? I did the ujoints on the front passenger side and there didn't seem to be a seal. There was no mention of a seal in the service manual either and I didnt really see one when I took it apart. What holds the diff oil in the punkin on the front axle? Does anyone have any info on this? I now have oil pooling on the front knuckle and it's all over the tire and some under the fender, I'm worried that the diff is going to go dry.