sound in rear end
 

My '88 GT has been almost totally redone.New almost everything.The rear end had a noise that sounds more like something is loose rather than low on dope.When I am in 4th and in town it sounds as if something is moving back and foward making a clinking sound.Could something be loose causing this?

a little help here would be appreciated Guys........Surely someone has an idea or something?

Man, could you describe the sound a bit more? And does it only happen in 4th gear? cause if so, it's not your rear end. Unless for some reason it only happens at a high axle RPM. Anyway, could be anything, a chipped ring or pinion tooth, a bolt that came out, a squirrel carcass. Who knows. Any noise is from a rear end is bad noise.

Michael.............kinda difficult to describe correctly but it sounds like something is loose and moving back and forth.When I am driving intown in traffic in 3rd or 4th it makes the sound.Maybe noise is the wrong description.Could there be slack in the rear end?

Is it also possible that what I am hearing is just the mormal movement of the read end and there is nothing wrong?

Just aggrivates me to hear the sound.

Michael,
I also have another question to pose to you.

I am making the change to underdrive pulleys and have gotten quite a variation of replies.

Should I use a regular overdrive pulley on my alternator to sustain hig voltage or will a underdrive pulley on there as well will give me the charging I require.I have working a/c and a stereo but not one of those booming things.Also.......approximately what kind of hp increase would you feel I will get with the ud pulleys?

And.............which brand of UD pulleys would you reccommend.

thanks,
Crimson

Get the cheapest underdrive pulleys you can find, In my opinion they will only make a slight difference but considering their cost, it could be worth it to you. 10-15 HP. maybe more I don't know, maybe someone's actually gone to the trouble of dynoing a car with and without them. As for the rear end, depending on where the sound is coming from and what the sound sounds like, it could be worn U joints, a screwed up axle bearing that's sloppy, a screwed up control arm bushing that's sloppy, something with your brakes, who knows, take it to a shop that will do a free inspection. Take it to more than one to see if they say the same thing. It's not really worth trying to diagnose a problem who's symptoms are a noise when I can't hear the noise. Know what I mean? It'd be like if you told a doctor "I've got this thing on my forehead, it looks weird, it's some kind of weird thing, what is it?"