T series rear brake options

[chubbylover53]

Gday all

I've been looking at what my options are for converting my RA40 drum brake rear to disks.
I've read that you can use ST141/RT142 brake setups but havent really been able to find any information about it. Now when people say RT142 are they talking about the brakes from the IRS avante coronas. If this is the case, what is stopping people from upgrading to
MA61 brakes intead which are ventilated.

Please give as much info as possible about this conversion and any others you may know about. If ther is already another thread about this please direct me to the appropriate spot. I did do a search but nothing detailed enough came up

Cheers for your help guys.
Mike

[Stefan]

You can't easilly mix & match between IRS and solid-axel rears, and you can't easilly convert drums to disks without replacing the axel.

I believe what you want is the rear end from an MA4x. Moslt likely bolt in. Not exactly common though.

[oldcorollas]

nissan don't know details, but it can be done.

[Stefan]

Well, sure, if you can be bothered relocating mounting points, I guess there are a lot of solid axel disc options. At a wild guess... R31??

[Hen]

I can't believe no-one;'s done a better write up yet, but here goes for fitting ST141 and RT142 rear discs to many diffs.

Donor car - Any disc braked, live axle T14 Corona. Take the backig plates, handbrake cables, calipers, discs and bearing retainer plate off the axle if you can.

Fitment car - Anything with a DRUM BRAKED T series diff, S series, E series, MX13 F series. Will not fit later F series or previously disc T series.

How to -
Bolt all the Corona gear onto your diff. It fits, however you will (may) find the caliper fouls on your shock mount. If so cut off you shock mount and reweld it 10mm inboard.

The disc bakcing plate is 5mm thicker than the drum backing plate. This means your bearing retainer plate on your exisitng axle is 5mm further outboard than before. This means that your bearing now has 5mm of side play.

This is not too good. Fix this by fitting the Corona axle bearing retainer plates (involves pressing bearings off and on). Or by inserting a 5mm wide slice of tube outboard of your bearing but inside your retainer plate. If you make the slice a C shape then you can get it on and off with the bearing still attached to the axle.

Now your handbrake cables will be too long. Either fold them over and clamp them with a turnbuckle, get them professionally shortened, or look into fitting your existing cables to the Corona gear. I can't remember if option 3 can work off the top of my head though.

That is it. Your existing brake hard lines can bend to fit and everything else is a bolt for bolt affair.

Brake bias may be rear-heavy now, but rip the spring out of the guts of your proportioning valve to improve the situation.

Hen

[thechuckster]

this might help as well:
http://www.toymods.net/forums/showth...=brake+upgrade

[skiddz]

im putting sonata v6 calipers on c210 skyline disks on the rear of the ta22 they have an integrated handbrake and the skyline disks are quite large

[o_man_ra23]

R31 skyline is the nissan you are all thinking of.

Integral handbrake is teh pooness... they lock up after a while of use, and when they do, say goodbye to your pads and disks... and expect the car to be off the road for a few days... the internal drum setups last pretty much forever.

The RT142 Avante setup is from the early 1985 model with solid axle, so pre-IRS. The IRS brakes are suitable for replacing drum rear RA65s. ST141 was also available with rear disks, so be on the look out for them too.

Handbrake cables I thought was not an issue with the RA40s due to the wider diff. Shock mounts do reportedly foul though... and you cant swap the disks left to right as the handbrake will then pull the wrong way.

[Stefan]

R31 skyline is the nissan you are all thinking of.

Yay, I was right.

The RT142 Avante setup is from the early 1985 model with solid axle, so pre-IRS. The IRS brakes are suitable for replacing drum rear RA65s. ST141 was also available with rear disks, so be on the look out for them too.

Are you absolutely positive? Did these come with F-series or T-series diffs? I actually purchased a TT142 (t-series) rear dsic setup for my Ra65, only to be informed that the control arms aren't properly compatible between F & T diffs.

[o_man_ra23]

Are you absolutely positive? Did these come with F-series or T-series diffs? I actually purchased a TT142 (t-series) rear dsic setup for my Ra65, only to be informed that the control arms aren't properly compatible between F & T diffs.

I wouldnt say absolutely positive... but considering there is minimal fuss adapting the A70 IRS rear brakes to a Hilux live axle diff... surely there isnt that much difference between the RA65 and T142s. Buy a welder and fix the problem Not sure what series the T142s came with, but would hazard a guess at F series (would guess they would use the same setup as the RA65... though they proved me wrong with the bog warmer live axle version)

[twentyEight]

The *T14# live axle is a Borg Warner and it's the disc brakes off these, and only these, that are suitable for use on the Drum Brake T, S, E, and F (MX13 only) Series diffs.

The *T14# IRS setup is an F Series and the disc brakes off these are suitable for the RA65s. (With possible exclusion of TT142 IRS)

[GA61XX]

What do you want to know..???

Rt142's rear disc set up will fit :- "T", "E", & MX13 "F" diff's...

Rt142's rear disc set up will fit :- RA40/60.. Use stock Rt142's hand brake cable's.... You also need 8 bolt's & 2 x spacer rings...

Rt142's rear disc set up will fit :- Ta22/Ra23/28.. Use stock Rt142's hand brake cable, 2 x RH side, the short one.... You also need 8 bolt's & 2 x spacer rings... & 2 x shocker hanger's...


Rings & bolts


Dona' Rt142 hanger's..





RA28's with hanger moved

You will also need tools to refit the brake lines.. or best done be a brake spec'ialist..


RA28's diff.

[Stefan]

The *T14# IRS setup is an F Series and the disc brakes off these are suitable for the RA65s. (With possible exclusion of TT142 IRS)

Yes, I bought TT142.

[chubbylover53]

Wow guys cheers for all the info. Wasn't expecting this much. Seems like there are a few different ideas out there so lets just clarify.

-The diff must be a borgie item not a toyota item

-RT142 live axle disk brakes will work with the addition of a 5mm C spacer and some modification to shock mount

- ST141 is much the same as the RT142 live axle?


I'll post a write up including pics when I'm all finished. Should work out to being a cheap upgrade for all those RA and AE owners out there with T series drums.

Cheers again.
Mike.

[twentyEight]

Correct, ST141 and RT142 live axle (Borg Warner) diffs are exactly the same and the discs brakes can be sourced from either of these...

GA61XX has some 5mm spacers and longer bolts for sale in the Classifieds for exactly this setup... http://www.toymods.net/forums/showthread.php?t=27530