98V6camaro

Well i went to look at a SS yesterday. It had 4.10's, torque arm and some other little supporting suspencion mods. So we went for a test drive and the rear whined a lot and pretty loud. I mean i have never driven/ridin in a car w/ 4.10's but i know that the richmonds are pretty loud which is what he had but i didnt know it would wine that loud. Also i notcied when taking turns there is a clank noise so i asked him about and he said it has something to do with the 4.10's being tight and also the suspecion not having any play. Does that sound right or is there something wrong? So if anyone has any idea what is causing this problem, please let me know. I also plan on taking it to my mechanic and having him take a look at.