I just bought a 88 blazer 2 days ago and today I heard a strange whistle / wining noise coming from it I can't tell were its coming from but it only does it when I accl. and get over 25mph,and it doesn't do it at idle going over 25. I tryed to check my level in my rear end because it looks like its leaking and I smelled gear lube burning, but the plug is stripped out and it won't come off no matter what I do. I was wondering if anyone knows if I could fill it through the breather tube just to get me by for a while till I tear it apart. I've never had to mess it so I'm not sure if it goes to the same cavity.