[Beast Mode]

My pinion seal is leaking and I have a wierd vibration in my dash where the center console meets the center dash piece. When driving between 20-55MPH. I was wondering if the bad pinion seal would cause this or is there something else wrong also I drove my car yesturday and now I have a vibration at 70MPH. I'm not trying to ask or say stupid stuff I'm just thinking that my pinion seal is causeing it but some of my buddy's say it's something else I just wanna make sure when I go to fix the problem I fix everything. Also I just rotated my tires last week could it be possible that I need an alignment cause when I come to a stop when I'm on the brake's my steering wheel begins to shake.