404 diffs
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Thread: 404 diffs

  1. #1
    Tadpole
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    Icon6 404 diffs

    Hi does any body know what the clearances in setting up the pinion and crown in a diff are?

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  2. #2
    Gone Fishin' Ray Bell's Avatar
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    Which diff?

  3. #3
    Tadpole
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    Default 1967 peugeot 404 diff

    Its a bronze worm drive of a 1967 model.
    Quote Originally Posted by Ray Bell
    Which diff?

  4. #4
    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by Le Pugman
    Its a bronze worm drive of a 1967 model.

    you need to get some bearing blue so you can check the contact point for the worm and the wheel

    you also need to set the pre loads on each as well

    the worm needs to be set so it spins very easily but without any movement and the wheel needs to be set so it has a little load on it and again no movement

    you then set the worm or the wheel so that the contact patch in centered under load

    they are very easy to set up
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  5. #5
    Gone Fishin' Ray Bell's Avatar
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    Do you have a workshop manual documenting this, Le Pugman?

    If you don't, maybe someone can scan the pages for you?

    You're supposed to use new through-bolts for the hemisphere (carrier) sides too. Be wary buying them, this should be the last model of those diffs, so it should have the biggest bolts. Take a sample when you go to get them.

  6. #6
    Fellow Frogger! Phil Whitton's Avatar
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    Default spares for practice and message for Ray

    Bonjour m.le pugman. I have two complete wheel to wheel from sedans if you are interested as they are not suitable for my ute.
    Also the remainder of a shell that will probably go the the tip soon.

    and Ray give me a call Ive lost your phone number.

    bon chance

    Phil

  7. #7
    Gone Fishin' Ray Bell's Avatar
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    I'll call you Phil...

    But Le Pugman might baulk at the freight to Toronto.

  8. #8
    Gone Fishin' Ray Bell's Avatar
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    Of course, that might depend on which Toronto...

  9. #9
    1000+ Posts Wildebeest's Avatar
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    Default 404 diffs.

    Le Pugman.
    If you are rebuilding a worm drive diff using the original gear set it is really a waste of time getting a contact pattern reading. The reason being that the bronze worm will have developed a wear pattern, to change this with adjustment will usually lead to an increase in operating noise.

    The factory manual shows a tool set for carrying out adjustment ie crown wheel position. Ok if you are replacing everything otherwise my earlier comment applies.
    I have carried out a worm diff overhaul just replacing bearings. I've just reassembled everything by using the original shims, checking of course that everything still turns with just a little "drag". Being carefull not to overload the pinion.

    If you are doing this job with the intention of getting rid of axle whine, forget it! With the original gearset the noise remains. Live with it, it's part of the 404's character.
    Oh, It wont be long before the "Reverse the Crownwheel" brigade start posting. It doesn't work.

    PS. Don't forget you will need the correct worm drive oil. Castrol STH 140 or equivalent.

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