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Club Member
Location:
sydney
Registered:
May 2002
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Location:
Canberra
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Sun, 14 September 2003 05:18
 
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For RA23 and TA22 Celica disc brake conversion, I can list my costs as follows:
RT141 Corona Avanti disc brake rear end from wreckers $350.00
Bearings and seals $80.00
Custom brake lines and hoses $120.00,
Workshop charges: Press off and on bearings(to change backing plate)$40.00. relocate shockie mount 25mm inboard on axle housing(to allow shock to clear caliper)$40.00.
We used Corona discs, as they are substantially bigger than AE86 discs, Hope this helps.
regards Chuck.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Sun, 14 September 2003 07:57
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hey chuck what size are the rotors and what pot calipers?
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Location:
Terrigal
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 00:02
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Gold28 and I were able to buy a complete F series rear end (MX23) with ST141 calipers and discs for $100. All appeared to bolt together well.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 00:16
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 00:33
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Hi Michael,
Does the conversion have to be a Toyota diff....?
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Location:
Adelaide
Registered:
June 2003
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 02:50
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TurboRA28
So the MX23 f series rearr end bolted straight up to the RA28 mountings?
I had a look at a few f series rear ends the other day and they certainly looked similar in lay out to the t series.
Did the tailshaft angles change at all in this conversion?
And the ST141 disks and calipers bolted on no worries?
If all this is true then I may just have a look at this as the ol' t series diff is getting increasing noisy again and I am getting increasingly paranoid about it giving up in the middle of another busy intersection.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 03:11
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Wouldn't it be great if it was that simple.
They definitly will not bolt straight up. You will need to transfer all the brackets from your existing diff to the new one. The diff is slightly wider, so it may cause problems with your wheels. Or alternatively you could cut the entire rear floor and subframe out of the corona and weld it into yout celica.
Yes the RT141/142 brakes bolt straight on and no you don't need to press the bearings off, just pull the axle and swap the backing plates. The bearing retainers stay with the axles and the backing plates bolt straight up.
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 04:19
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what tail shaft are ya using?
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Location:
Terrigal
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 04:26
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It appears that the standard tailshaft should fit. The bolt pattern is definately correct. Hopefully it will still be the right length.
By the way, OZ_Craig.. I do have those door handles. How do you want to get them?
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 06:16
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I think it was a F312, which is a 3.9 ratio.
I will measure the total width for you this afternoon. I will measure the yoke length too to see if any tailshaft mods will be required.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 06:27
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Thanks for that guys.... i was just trying to figure out if my own plans were a viable option in terms of effort and cost, and im glad to say its all looking good, hopefully it will all be together in a week or so 
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Location:
PNG
Registered:
June 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 10:08
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Gidday
Gold28 - not sure whether you have done this conversion but!! And by the way Chuck has actaully done one too - he also might know what he is talking about.
I have done it twice now and I think that the advice you are giving is not quite correct - the retaining plates must be swapped over.
IRA11Y
Have a look at the technical articles, I put one there some time ago covering just this conversion. This will cover all that you need to know. I have provided step by step instructions as well as provided some idea of the costs to put rt141(2) disc on your RA23.
I have also fitted a mx23 rear end to my 23. No it is not a bolt in, but yes the Rt141(2) discs also fit that. I have also provided a long thread response on how to do that - just do a search.
happy to answer any questions.
Craig
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Location:
Malta-europe
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 14:13
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Hey i got a Sprinter Cielo/Corolla Liftback/Seca
and i want to convert the rear drums to disc, do you think i can take of the rear axles of a corolla GTi (AE92) and use those to have the closest fits and least custom manufacturing?
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 21:22
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thanks Craig,
Ive allready read pretty much all the conversion types there are between NZ and the US so its not a matter of "what" but more a matter of trying to see if my own design is of good cost value to other setups ive seen. If I had of liked any of the other setups they would have been in by now, but its taken me a little while to sort my own setup out then have the funds to do it.
once again thanks to everyone for your input
cheers michael
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 15 September 2003 21:43
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Craig, why was it necessary to swap the retaining plates over. Is there something I have missed??
I measured the span to be roughly 65mm wider than the RA28 diff.
The yoke is 15mm longer than the T series, so we might have problems with the length of the tailshaft.
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Location:
PNG
Registered:
June 2002
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 02:41
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Gidday
The backing plate on the drum brakes is sheet metal, however the disc brake setup has an additional 5mm alloy mounting piece for the calliper. As a result the bearing retaining plate is also of 5mm alloy to compensate. If you do not swap the bearing retaining plate the bearing will be flopping in the wind. Bit difficult to explain but once you have had a close look it will be obvious.
The tailshaft will need to be shortened by 20mm if you are fitting the mx23 rear end (F series).
Craig
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Location:
Terrigal
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 02:48
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Hmmm I got a bad feeling we are going back to pick n payless.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 02:53
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I practially live there:( and whats worse when i moved I got even cvloser to it, down from 5 mins to under 2mins LOL
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Location:
c'town, NSW
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 02:55
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michael so your the one in the brown ke70 I see zooming round blacktown while driving home from werk?
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Location:
Adelaide
Registered:
June 2003
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 14:22
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BUGGER, oh well, I'll just have to chase up a RA28 f series rear end then.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Tue, 16 September 2003 21:52
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Best of luck to you Steve
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Wed, 17 September 2003 11:01
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| Quote: |
michael so your the one in the brown ke70 I see zooming round blacktown while driving home from werk?
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not unless its a grey shade of brown but yes I drive across sunnyholt around 3:30 each day
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Drum to disc rear conversion costs?
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Wed, 17 September 2003 12:23
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just look out for the ugly beaten up black one that u might see coming from piccies every now and then....
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Wed, 17 September 2003 19:45
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aww cmon Karl its not ugly.... it just has charisma! LOL
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Location:
c'town, NSW
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Wed, 17 September 2003 22:31
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doh  i did mean silver... do u still have the MA61 wheels on it?
perhaps im seeing the wrong car, saw one this morning (the #E70 i always see in blacktown) and it had a TOYOTA decal on the windscreen and some 15inch alloys.
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Thu, 18 September 2003 00:04
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Love the rally suspension Michael!!
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Location:
Malaysia,Kuala Lumpur
Registered:
July 2002
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Re: Drum to disc rear conversion costs?
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Thu, 18 September 2003 07:18
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HI guys, no intentions to hijackl the thread, But just tried a search and not sure about some of the details, But can someone please tell me if The Cressida GX60/AE86 Levin share the same type axle, AE86 being disc of course, cause i want to swap one,and if there are similiar type axle's even if not Toyota i'd like to know about it.
cheers
Dom
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Club Member
Location:
sydney
Registered:
May 2002
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Thu, 18 September 2003 21:34
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I am pretty sure the cressida has an f series, while the sprinter would probably have a t series. The cressida axles will be a lot bigger than the sprinter axles.
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Location:
Brisbane
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Thu, 18 September 2003 22:39
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The GX60 more likely has an E series axle. That's what the local MX62's have anyway.
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Location:
Terrigal
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Thu, 18 September 2003 23:05
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Aus spec sprinters have S series.
The MX10 coronas have E series too.
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Location:
Malaysia,Kuala Lumpur
Registered:
July 2002
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Re: Drum to disc rear conversion costs?
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Fri, 19 September 2003 03:32
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Norbie,Gold28 , if it's the E series Axle, is there anything that either of you have seen that's resembles it with disc brakes, I guess trying to retro fit AE86 would not be a good idea..
cheers
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 00:11
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Never taken a second glance at a cressida, or a sprinter for that matter. Spend half a day out at a wreckers and measure a few up, you may find a great solution that no-one has thought of before.
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Location:
Gawler, SA
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 01:04
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Anyone put rear disc brakes on a sprinter?
If I got hold of some disc brakes from a sprinter would they readily fit onto the rear axle without having to modify anything?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 01:09
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the only place you get ae86 rear discs (i think) is the same place you get an ae86 lsd - trueno. good luck
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 02:02
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im currently in the process of converting my t series rear end to disk using S13 disk and calipers.
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Location:
Gawler, SA
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 03:52
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So front discs wouldnt fit then?
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 04:09
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You'll find the piston size is different. If you put front calipers on the back, they will be way too strong.
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Location:
Gawler, SA
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 04:57
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Is there anyway of changing how strong they come on?
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Mon, 22 September 2003 06:50
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yes, you can custom make, or buy a brake bias adjuster, revoluition racegear have two types they start from about $150, i made one up from a high pressure valve for less than $50 for my old rally car
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Location:
Gawler, SA
Registered:
August 2003
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Location:
Gawler, SA
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Tue, 23 September 2003 09:14
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Anyone?
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Location:
Adelaide
Registered:
June 2003
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Re: Drum to disc rear conversion costs?
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Tue, 23 September 2003 12:32
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Thanks for that, but really it shouldn't be all that hard, I mean, we've found a few f series RA28 diff before, and I found another one today.
All I have to do is find the housing to match, if they've got the centre, they must have had the housing somewhere, right?
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Tue, 23 September 2003 21:37
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As far as I know, only the GT RA28's had the F series diff in them and they didn't come into this country. I may be wrong, but I would have thought that they would be rather difficult to come across here.
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Location:
Canberra
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 00:18
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SPeaking from my knowledge of physics, not cars, changing the line size will have no effect...
P1V1 = P2V2 = P3V3
where 1 is the master cylinder, 2 is the line and 3 is the slave cylinder. And - P is for pressure, V is for volume.
Re arranging the equation
P1V1 = P3V3
P1V1 / V3 = P3
which gives you the final pressure applied by the slave cylinder, which is not dependant on the size of the lines (neither p2 or v2 play a part in determining the final pressure)
sorry to ruin a perfectly good forum with the use of physics 
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Location:
Hunter Valley
Registered:
February 2003
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 01:13
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What disc and calipers would you use for conversion on aus-spec AE86? Least modification and most effective?
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Location:
Gawler, SA
Registered:
August 2003
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 01:59
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You will need to fabricate some brackets to hold the caliper on.
Talk to an engineer with your proposal first because this is definitly something that needs engineering approval.
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Location:
Gawler, SA
Registered:
August 2003
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 02:35
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I was thought that when you remove the disc brakes from the front they would have all that in 1 piece?
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Location:
Perth
Registered:
May 2003
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:01
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so do you need an enginers certificate if you change to disks on the back?
I've got an f series with drums will i be able to simply swap over the disks from an f series with disks? (my diff is sweet thats why i wouldnt do a hole swap)
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Location:
Melbourne
Registered:
May 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:04
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Callifo: You probably don't want to use the front calipers from a sprinter because you won't have provison for a hand brake.
Not unless you go hydraulic, but they aren't street legal as far as I understand.
Daniel
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:06
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Yup but I don't know of too many 4 stud F series live axles with disc brakes. The RT141/2 live axle corona brakes pretty much bolt in place. You will need to fabricate some brake lines though.
Unless your car came with a standard option for discs on the back, it will need engineering approval.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:10
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Good point Daniel.
The hand brake is an emergency brake and thus needs to be fully independent of the primary brake system. Hydraulic hand brakes are illegal because a hydraulic failure would only leave you with a pair of dunlop volley's to slow the car down.
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Location:
Perth
Registered:
November 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:35
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my volleys always slowed my bike down good tho..
This is a great topic, its given me some good idea's as to what I want to do with the rear of my car after a 1G conversion, cause I do want to put discs up the back. Looks like its an RT141 down back
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Location:
Madrid - Spain
Registered:
August 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:38
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Hate to burst your bubble but an RT141 diff won't last all that long behind a 1G if your a spirited driver.
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Location:
Perth
Registered:
November 2002
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:43
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I'm a very spirited driver sometimes, what would be the best back end with discs on the side?
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Location:
Perth
Registered:
May 2003
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Re: Drum to disc rear conversion costs?
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Wed, 24 September 2003 03:48
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an f series? 
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