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Author: Subject: Rear disk conversion
sonic

posted on 15/9/05 at 11:52 AM Reply With Quote
Rear disk conversion

Hi guy's

I was thinking of converting my MK Indy
from rear drums standard seirra diff to lsd and rear disks.

However i have been told that the 7" 4x4 lsd doesnt really work due to the car being to light in relation to the 4x4 seirra it was designed for and i would be better off converting my standard sierra rear drum set up to disks
How do i do this and what parts do i need?
the diff is 2lt sierra with the push in type drive shafts

any help would be great

thanks

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Hellfire

posted on 15/9/05 at 12:05 PM Reply With Quote
Got to ask - why?

Generally drums are more than up to the job or is it for how they look? Lot of hassle for little gain... IMHO






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sonic

posted on 15/9/05 at 12:50 PM Reply With Quote
hi there

i am just an old tart really!!!!!!!!

more looks than anything else
i think the car looks more purposeful with disks and you don't see many fast sports cars running disks anymore

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sonic

posted on 15/9/05 at 12:51 PM Reply With Quote
Whooops!
should have said drums in my last reply

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smart51

posted on 15/9/05 at 01:02 PM Reply With Quote
The sierra diff is basically an open diff with a viscous coupling. Normally it works like an open diff. If one of the rear wheels spins then the viscous coupling starts to work. The coupling slows down the spinning wheel by linking it to the gripping wheel. If you find that you wheelspin in your car then an LSD will work for you. If you never get wheelspin then you don't need an LSD.

Disk brakes and drum brakes give the same braking effort for an equal area of friction material (shoes and pads). Disks drain quicker when wet and don't fade as quickly when hot (they cool quicker). Drum brakes have better handbrakes. If you've ever felt that your rear brakes are fading under repeated extreme use then you may benefit from discs, otherwise drums are just fine.

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zetec

posted on 15/9/05 at 02:03 PM Reply With Quote
As said drums are well up to the job, my rear discs never get hot. I would say that the LSD does work, I leave two black lines up the road instead of one!





" I only registered to look at the pictures, now I'm stuck with this username for the rest of my life!"

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britishtrident

posted on 15/9/05 at 03:23 PM Reply With Quote
Fade aside the big advantage of disc brakes is feel --- because they are mechanically stiffer than drums they give a much more solid and with discs all round the front and rear brakes should have very similar characteristics irrespective of temperature.

One minor disadvantage with discs particularly when used without a back plate shield is that on wet motorway journeys they can build up a thin greasey surface coating that causes he brakes not to work properly for a heart stopping split second when they are first applied.
Interestingly BMW have altered thier EDS and ISP system so that it gently applies the brakes every few miles to clean the discs.

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BKLOCO

posted on 15/9/05 at 05:34 PM Reply With Quote
Darren at GTS does some nice adaptor plates to convert drum set up with push in drive shafts to sierra rear disks.





Experience is what you get when you don't get what you want!!!

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jambojeef

posted on 16/9/05 at 01:36 PM Reply With Quote
Hi there,

Ive got some rear disc conversion adaptors for sale!

I want rear discs but am gonna have to fab my own since the ones I bought foul my top suspension mounts

u2u me if anyone is interested

Geoff

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