I am new to this forum, but i have been a supra fan sincd day one. Anyway. I found this 84 celica supra..red and near perfect condidtion. I mean i looks like it was driven off the showroom. It has only 43,000 miles..all original. I looked it all over for rust..No rust. And i drove it and tried everything all out. Now here is whats wrong. When going at highway speeds 70-80h mph. and you let off the gas the check engine light blinks on real quick. Then there is also a sound from the rear end. not like a clanking noise. More like a winning noise, like something is making too much friction. Both only acure when the car is going fast/accelerating and you let off the gas. The rear end noise is very faint. windows must be down, and you gotta listen real good. The guy is asking 5,000. Should i get it. should i be concerned?