R12/17 disc rear end differences
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Thread: R12/17 disc rear end differences

  1. #1
    Fellow Frogger! Jensen's Avatar
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    Default R12/17 disc rear end differences

    Does anyone know if the rear beam itself was a unique part for 12/17s with disc rear ends or is it the same as the rear beam on cars with drums?

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    Basically want to know if you had the discs/hubs and the calliper brackets, could these be bolted on to a rear beam that originally had drums?
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  2. #2
    1000+ Posts schlitzaugen's Avatar
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    Nope. Different beam ends.

    Not to say it could not be done with some surgery, but it's not as straightforward as bolting on the disc end tidbits.
    Last edited by schlitzaugen; 11th August 2014 at 01:44 AM.
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    Fellow Frogger!
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    What?? I'm sure they're the same.... Maybe it's just the wagon that's the same... I've swapped them over, only difference I could see was that the disc brake one had brackets for the flexible brake pipes to sit in.
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    1000+ Posts schlitzaugen's Avatar
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    Different back plates riveted (welded?) to the beam ends.
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Fellow Frogger! Only19's Avatar
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    The backing plates are bolted ... I remember this as too many hand-brake turns in my 12 wagon during motorkhanas wore the holes oval.
    Who needs brakes? They only slow you down ....

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    VIP Sponsor David Cavanagh's Avatar
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    Quote Originally Posted by angru View Post
    What?? I'm sure they're the same.... Maybe it's just the wagon that's the same... I've swapped them over, only difference I could see was that the disc brake one had brackets for the flexible brake pipes to sit in.
    Agree, we've just welded the brackets on and used them without any problem.
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    Fellow Frogger! Jensen's Avatar
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    Great thanks everyone, my parts book had different numbers for the actual rear beam for disc and drum cars but sounds like it's just the hose brackets that differed.
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    Ok, the next question is, what rotor, hub, bearings, calipers and bracket do you stick on it?

    How do you manage the handbrake attachment?

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    Fellow Frogger! Jensen's Avatar
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    Rotors are easy, R12 fronts.

    Hubs and calliper brackets are tricky, they are from 12G/17TS/G.

    Callipers themselves I think are shared with Fiat 124 (somebody might be able to confirm).

    Handbrake cable and hoses from Mecaparts.
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    The same callipers are also found on R20 diesels. Not much help as none came to Australia. I got a set from someone who got them from an R20 in New Caledonia. I mentioned to a brake repairer that they were rare and he also said to me that they had similar ones on either a Fiat or a Subaru.

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    Fellow Frogger! Jensen's Avatar
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    Ok brains trust, a follow up question. Are the beams also the same between R12 sedan and R12 Wagon/R17?

    Reason I ask is I have a complete 17TL rear beam here ready for R8G's R12 sedan. Rather than ship the whole rear beam, can I just send the larger drums to bolt on to his sedan rear beam?
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    Quote Originally Posted by Jensen View Post
    Are the beams also the same between R12 sedan and R12 Wagon/R17?

    Reason I ask is I have a complete 17TL rear beam here ready for R8G's R12 sedan.
    In a nutshell, yes. However, is R8G's car a Virage? In which case, if the oval plate number is 7115 onwards, it may be fitted with the wider 18GTS rear beam, which also has different wheel bearings.
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