New noise from the rear end, what do you think??

[v8only]

well, got the stang back from the top shop. Top looks great!!! (before and after pics to come some time this week)

However, now I have a problem with the rear again.

I'm going to take it apart soon to figure it out, but figured I would ask you guys first to see what you think.

Remember, I just put in a used tbird turbocoupe 3.73 rear, kept the drum brakes, installed pro3i lower control arms, cobra uppers, 99+ gt shocks, and an aluminum driveshaft.

when I drive, I hear this scrape scrape scrape scrape that seems to go with the revolutions of the rear wheel/axle, coming from the rear drivers side.

Additionally, when I shift into any gear, I get a clanking coming from somewhere back there that sounds like a driveshaft with bad ujoints would, but this is a new frpp alum driveshaft.

Any opinions/?? Who thinks it is just another classic case of rear wheel bearings??? What else could it be?? I am not a rear end expert (yet) btw, it isn't the brakes making the metal to metal scraping sound, and I am certain of that.

[abell82]

Bent backing plate, or tire rubbing fender?

[v8only]

Bent backing plate, or tire rubbing fender?

very interesting, I don't think so though.

I forgot the interesting point, which may be a dead giveaway. If I am cruising, and hear the noise, I can turn the wheel slightly to the left or so, which makes the noise go away.

Purhaps this puts some pressure on something in the rear??

[85Coupe50]

Sounds to me like the driveshaft may be rubbing on the exhaust. The driveshaft is a lot larger in diameter than the stock one.

Check it out.

Also there is always a little slack in the driveline. The gears will just make it more noticeable.

[Zap's 85 GT]

Are the brakes grabby or pulsate? Do the wheels wobble when driven on jackstands. That may be a bad axle.
Check the traction lock's condition. It may be the source of the noise and req rebuilding.

[abell82]

You sure it is coming from the back and not the front ? Sounds like bad brake pads.

[v8only]

It does sound like brake pads, who the hell knows, this is fusterating as hell. by the time I get home from work, it is too late to do anything. Oh well, I will keep you all posted.

[86notch]

Check to make sure you dont have a loose brake spring or that the adjuster stop has not gotten out of alignment or came loose and is scraping the drum or pad just a thought .

[not-a-stang]

I have to agree with the exhaust rubbin' the driveshaft.

It used to happen in my Chevelle before when it had some crappilyy routed glass-packs. I thought it was the rear too, till I noticed the markings on the d-s from the rubbing.

Hope that helps.

[v8only]

That sure would be an easy fix!!

Shoot, I'll just crawl under my car tonight and check it out. Will update tomorrow.

[wildstang]

Check to make sure you dont have a loose brake spring or that the adjuster stop has not gotten out of alignment or came loose and is scraping the drum or pad just a thought .

That's exactly what happen to me this summer , took a hell of a long time to get it since I was only pulling the drum on the side that wasn<t the problem . Sometimes we think it's comming from one side and in fact , it comes from the other one.

Did you put some new bearing when you did the swap ?? Maybe it's just like you said , a freeking bad bearing !!!

Keep us posted !!

[v8only]

Alright, perhaps I am just a doomsday perceiver, or perhaps I got lucky...I found the problem, and it fell into my lap literally the second I pulled the drum off.

http://www.imagestation.com/picture/sraid99/p6940c7c3478c24c61b90f11d7a438357/f9eec188.jpg


http://www.imagestation.com/picture/sraid99/p5899e1b7373def2289cd1c826d80c812/f9eec18b.jpg

http://www.imagestation.com/picture/sraid99/p5667cd40edd40351db30898f113d6ee7/f9eec18e.jpg

I fixed the problem, then almost lowered the car, and decided, wait, so I crawled back under, and sure enough, every driveshaft bolt was finger tight....Locktight guys!!!! So I got under their re aligned my alum driveshaft green dot to green dot on the flange, locktited her, and took it for a test drive, no noise, no clunk!!!!


Thanks a million for all your help, it only took me a leisurly hour, and it was fun too> I am driving this baby to work tomorrow, gonna get it washed, and post pics soon of my new top.