Hey there guys, just a question. Have any of you experienced shuddering/vibrating upon accelerating? I've troubleshooted a little bit and it doesn't shutter while I'm coasting/constant speed but when I start to accelerate a little more , it vibrates again. I never really noticed the problem when I purchased the car. Ive heard that I might need to speed balance tires, but it's weird that it's only when I accelerate and not all the time. Im hoping it's not the rear differential going bad. Can anybody with experience or know about the problem point me to the parts to check beneath to check when I go and check this weekend? I'm also going to drain the differential oil and put some new fluid in too to have a piece of mind. Thanks in advance!