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Sierra front disk brake conversion

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Jackson

Joined: Mon Apr 04, 2011 5:56 am
Posts: 559
Location: Newcastle
Vehicle: Yellow Ute

Posted: Mon May 30, 2011 7:46 am

G'day,

Just wondering if anyone has upgraded the drum brakes on an SJ40 to disc brakes. What they used? And how they did it?

Thanks,

Jackson

mrw82

az supporter

Joined: Tue Jul 03, 2007 11:30 pm
Posts: 1350
Location: stuck in a hole. not off road, just deception bay.
Vehicle: snotbox, 84 LWB sierra 1 litre

Posted: Mon May 30, 2011 7:53 am

you can use the disk brake setup from a later model 1 litre or any 1.3

Jackson

Joined: Mon Apr 04, 2011 5:56 am
Posts: 559
Location: Newcastle
Vehicle: Yellow Ute

Posted: Mon May 30, 2011 7:56 am

So that would bolt straight on?

Does it matter if the disc brake setup comes off a wide track?

Thanks,

Jackson

Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 13007
Location: Melbourne

Posted: Mon May 30, 2011 7:56 am

It's a straightforward swap. After buying my 1.0 with a drum front end, I never put it on the road with drums - I swapped discs straight into it.

Steve.

jimbo_jones

az supporter

Joined: Sat Jul 19, 2008 11:30 pm
Posts: 4361
Location: gong
Vehicle: 2015 Jimny, LJ50, Maruti

Posted: Mon May 30, 2011 10:27 am

I got 1lt diffs complete with brakes you can have for free

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Jackson

Joined: Mon Apr 04, 2011 5:56 am
Posts: 559
Location: Newcastle
Vehicle: Yellow Ute

Posted: Tue May 31, 2011 7:23 am

One more quick question. Would I be correct in thinking that I will need a disc brake model master cylinder?

jimbo_jones

az supporter

Joined: Sat Jul 19, 2008 11:30 pm
Posts: 4361
Location: gong
Vehicle: 2015 Jimny, LJ50, Maruti

Posted: Tue May 31, 2011 8:34 am

Jackson wrote:

One more quick question. Would I be correct in thinking that I will need a disc brake model master cylinder?

and a brake booster

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mrw82

az supporter

Joined: Tue Jul 03, 2007 11:30 pm
Posts: 1350
Location: stuck in a hole. not off road, just deception bay.
Vehicle: snotbox, 84 LWB sierra 1 litre

Posted: Tue May 31, 2011 11:15 pm

you could get a 1.3 master cyl with booster, but i have been told they bolt up differently.
You would be better off getting a master cyl off a late model 1 litre with disk brake front but no booster. If buying a new one tell them you want one for an 84 1 litre. (yes drum to disk is a different master cyl, but i dont know how it would affect braking performance, if at all.

303zuke

az supporter

Joined: Wed Aug 19, 2009 11:30 pm
Posts: 2447
Vehicle: LJ50V, SJ70

Posted: Wed Jun 01, 2011 1:47 pm

jimbo_jones wrote:

Jackson wrote:

One more quick question. Would I be correct in thinking that I will need a disc brake model master cylinder?

and a brake booster

No, the 1.0lt don't run a brake booster with discs. The replacement SJ410 M/C from Suzistore is the Disc Brake version, seems the drum version is very hard to find new or aftermarket..

Although the firewall to pedal dimensions are the same, the Boosted master cylinders bolt up very differently and will require modifying your firewall.

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