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Thread: Changing a diff

  1. #1
    Racer Decade Plus User Paul_G's Avatar

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    Changing a diff

    I am thinking about changing my diff to a 3.89.
    How difficult a job is this, how long should it take and do I need special tools?

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    Way too much free time Decade Plus User Retromotorsport's Avatar
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    Re: Changing a diff

    As you have an English Axle ( Diff and CWP bolt in from the front) its easy, just change the whole lot.
    Wheels off, drums off, 4(each side) half-shaft bearing retaining plate bolts out, slide the shafts out a few inches. Then undo the prop, undo all the 1/2"/13mm nuts that hold the diff housing in place on the axle, leave 1nut either side loosely fitted to stop it falling on your head, prise it away from the axle (banjo) and let the smelly oil drain out. Then carefully take the last 2 nuts off, and try to catch the heavy diff housing as it makes a beeline for something soft and painfull on your body.
    Do not take anything out of the diff housing, as without special tools you can't re-build a diff and CWP.
    The new Center can go back in in reverse order, use a new gasket, top up with fresh oil till it runs out of the filler hole in the back the axle and away you go.

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    Pit Crew Decade Plus User EscortDan's Avatar

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    Re: Changing a diff

    As the man says, pretty easy really, only thing you might need it a slide hammer to get the half shafts to move out if they have never been removed before! Also i find that when i put the new diff back in i add about 2 washers to each of the bolts that hold the diff in as they are a bigger to get a spanner or ratchet on sometimes and that just makes it really easy as there is more to get onto!

    Dan

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    Racer Decade Plus User Mr_Hoarder's Avatar

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    Re: Changing a diff

    As the man says, pretty easy really, only thing you might need it a slide hammer to get the half shafts to move out if they have never been removed before! Also i find that when i put the new diff back in i add about 2 washers to each of the bolts that hold the diff in as they are a bigger to get a spanner or ratchet on sometimes and that just makes it really easy as there is more to get onto!

    Dan
    Good advice about the washers

    Use a 6 sided socket on the bolts too, a 12 pointed socket is virtually guaranteed to round them off

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    Pit Crew Decade Plus User EscortDan's Avatar

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    Re: Changing a diff

    Has helped me out no end using the washers on the bolts, about 2 or maybe 3 is about al you need, nice and thin ones though!

    As for the socket, deffo a 6 sided one as i found out that using a 12 sided jobbie and couldn't get them out as the bolt was now round!!

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    Racer Decade Plus User Paul_G's Avatar

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    Re: Changing a diff

    Thanks for the brilliant advice.
    Got to get one now, how much should I pay for one?
    Cheers
    Paul

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    Re: Changing a diff

    one just went for 30 complete on ebay 23:45

  8. #8
    Way too much free time Decade Plus User Retromotorsport's Avatar
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    Re: Changing a diff

    have a word with Mr_Hoarder (pm on here) or darren, from escort-tec, you'll find his number at the entrance, one of them will have a complete center section

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