Help needed, Halfshaft/disc probs.

[sambo]

I just thought i'd ask on here if anyone has had similar woes....

 

i am fitting rear discs to my atlas rear end but on one side, after bolting it all up, the disc just wont sit flush to the shaft flange. This means that it has a tight-spot when passing through the caliper making a 'whoooping' noise.

No matter what i try, it wont sit flush, the faces of both pieces are clean and it isnt a warped disc as i have swapped the discs over and it still does it whilst the other side is fine.

 

i have put the wheel on a tightened the nuts F'ing tight to see if it will pull the disc flat but, nope. No good.

 

Any ideas? Anyone had a simlilar problem?

 

I cant think of a solution other than buying another shaft/s and trying that. This means that i have to fork out for new shafts and then fork out more to get them machined on a lathe to accept the discs.

 

[Retromotorsport]

Its a bent shaft .... has to be,

jack the rear up, put two axle stands under the axle and start the car up, put it in 1st and get out, look at the wheel rim and see if its wobbling

[sambo]

Hi Gary,

 

start the car up???!.......

 

I have put a piece of wire next to the halfshaft flange mounted on the axle and it looks as though the flange is running true?

But like you say, it HAS to be the shaft. I cant think of anything else?

 

Oh well, its another £50 down the drain.

[Ken B]

I presume who ever machined your h.shafts did put a big enough chamfer on the outside diameter. I've had this before especially with aftermarket discs, the internal radius in them, often varies and wont allow discs to sit true if the shaft chamfer isn't big enough.

[sambo]

Hmmm, the flange isnt chamfered atall?

 

I might try filing the outside edge and see if that helps?

 

Cheers mate.

[Ken B]

I used to do disc brake kits for Anglias which involved machining front hubs etc. all similar process yarda yarda. I had to put a 3mm/4mm chamfer at least to clear some of the internal radius's found on brake discs. Best break out your grinder rather than a file.

[Retromotorsport]

Ahh now i had assumed that your shafts where allready taken by 3mm (6mm total) ..... yep get the grinder out

 

you can slip the shaft inside a piece of tube, and run a sanding disc at 45 degrees to the flange, this turns it and grinds away at the same time and produces an even removal of metal, almost as good as a lathe

[rallyesport04]

you can slip the shaft inside a piece of tube, and run a sanding disc at 45 degrees to the flange, this turns it and grinds away at the same time and produces an even removal of metal, almost as good as a lathe

 

top tip

[Col-ashtonmobile]

does it turn freely if you take the caliper off but leave the bracket on , a set i did i had to file out the bracket slighty where the disc passes through it .....

[PlopPlop]

I'm guessing the discs not sat on 100%, if the face of the halfshaft was'nt flat and true then your wheel would'nt spin true either