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Thread: Overhauling a rear axle - how far to go?

  1. #1 Overhauling a rear axle - how far to go? 
    club member Club Member
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    I have totally dismantled my car now and am assesing what, and what not, to replace.
    The rear axle certainly needs new spring platforms as they are severely weakened by rust. That should be a relatively straightforward welding job.
    And it looks like it probably needs a new pinion oil seal as it was oily in that area.
    But should I attempt to strip it any further or would I just be opening a can of worms? I believe the halfshafts, for example, are extremely difficult to remove. And most of the other things that could be replaced seem to require that.
    Of course I will be replacing the brake shoes and slave cylinders as a matter of course, but they are easy to get to.

    As usual - all input gratefully received!

    Cheers, Robin
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  2. #2 Re: Overhauling a rear axle - how far to go? 
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    Halfshafts are easy to remove, getting the outer hub bearing off the shaft isn't.
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  3. #3 Re: Overhauling a rear axle - how far to go? 
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    Hi Robin, if it is just the pinion oil seal you need to replace then the axle and diff shouldn’t need dismantling.
    I used some strong flat bar with two holes drilled to match the prop shaft bolt holes and a cut out to access the pinion nut then with some force got the nut undone then simply remove the pinion flange and replace the oil seal.
    1275 Marina/Ital based LWB Roadster in the process of a ground up rebuild.
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  4. #4 Re: Overhauling a rear axle - how far to go? 
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    Thanks guys. In that case I may pull the halfshafts so I can check the diff.
    Do I need a slide hammer for that?
    Cheers Robin
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  5. #5 Re: Overhauling a rear axle - how far to go? 
    club member Club Member stevejgreen's Avatar
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    Quote Originally Posted by martinclan56 View Post
    Thanks guys. In that case I may pull the halfshafts so I can check the diff.
    Do I need a slide hammer for that?
    Cheers Robin
    everything you ever wanted to know about Marina axles can be found on Keepandshare.
    access to a 25 ton press makes bearing and hub removal really easy.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  6. #6 Re: Overhauling a rear axle - how far to go? 
    club member Club Member listerjp2's Avatar
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    If you do decide to replace the half shaft bearing make sure when it's pressed on the distance from the bearing to thread end of axle shaft distance is 2.84 in (69.94mm) as this is crucial.

    Adrian
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  7. #7 Re: Overhauling a rear axle - how far to go? 
    club member Club Member listerjp2's Avatar
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    As per attached

    rear axle and final drive 1 of 2.jpg

    rear axle and final drive 2 of 2.jpg

    Quote Originally Posted by listerjp2 View Post
    If you do decide to replace the half shaft bearing make sure when it's pressed on the distance from the bearing to thread end of axle shaft distance is 2.84 in (69.94mm) as this is crucial.

    Adrian
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  8. #8 Re: Overhauling a rear axle - how far to go? 
    club member Club Member stevejgreen's Avatar
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    You will be lucky to find the service tools listed in those instructions. Don’t be fooled into thinking that a DIY three leg puller will do the job, there is a reason why there are substantial pullers nominally for Triumphs that have similar axle designs available on eBay for £100 or there abouts.
    But similarly don’t be put off, many tyre fitting companies have hydraulic presses and for a large box of teabags and biscuits, they will happily do the job.
    Don’t lose the woodruff key.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  9. #9 Re: Overhauling a rear axle - how far to go? 
    club member Club Member andyf's Avatar
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    I bought a hydraulic three legged puller that did the job, bent the tommy bar though!
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  10. #10 Re: Overhauling a rear axle - how far to go? 
    club member Club Member stevejgreen's Avatar
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    Quote Originally Posted by andyf View Post
    I bought a hydraulic three legged puller that did the job, bent the tommy bar though!
    It can be done, but the hub is rectangular so a three point puller is an uneven pull and can release unexpectedly.
    Don’t be tempted to use heat as it may effect the temper of the steel of the hub or halfshaft, a known weak spot.

    There are two different sizes of Oil Seal.
    Read my Rear Axle article on Keepandshare for full info. It’s free once you have registered.

    https://www.keepandshare.com/doc/403...2-10-34-pm-81k
    Last edited by stevejgreen; 11-02-2021 at 01:55 PM.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
    Reply With Quote  
     

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