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Thread: Leaking 5-speed drain plug

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

  1. #21
    Yoda Jim_Gruber's Avatar
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    Re: Leaking 5-speed drain plug

    Update: Transfer Idler Gear was installed backwards and was not making full contact between main shaft and lay shaft. Pics to follow in am. I think we’ve found source of whirring noise, gear was only making 1/2 contact connecting to layshaft. Now rear seal leak to fix.
    Jim Gruber - Tampa/Riverview FL
    Bugsy I - '68 Sprite w BE Bonnet - Gone but not forgotten
    Bugsy IV - '60 Bugeye - 1,275+.040 and a 5-Speed - CA Car - 2nd Owner from new -

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    Yoda Jim_Gruber's Avatar
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    Re: Leaking 5-speed drain plug

    Bugsy Tranny Autopsy 1 100_3743_LI.jpgBugsy Tranny Autopsy 2 100_3744.jpgHere are the pics as promised of Bugsy's Tranny Autopsy. Comments from the Shop Owner on tranny .

    So far I have actually discovered the transfer idler gear was on backwards, and was not aligned with the mainshaft and layshaft gears. Assuming this gear had run for its whole life by turning (and seating in) in one direction and was then asked to push the other way, it could certainly explain a noise. It is all I have found so far, but it certainly is an assembly mistake by the last guy. Since it not something that is done wrong with any frequency, it would be hard to say 100% that this would cause a noise.



    Here is the only problem I have found so far. You can see the offset of gear teeth outlined in yellow on 3743. On the other photo, 3744, I have turned the gear around and now there is good alignment.
    Jim Gruber - Tampa/Riverview FL
    Bugsy I - '68 Sprite w BE Bonnet - Gone but not forgotten
    Bugsy IV - '60 Bugeye - 1,275+.040 and a 5-Speed - CA Car - 2nd Owner from new -

  3. #23
    Yoda Trevor Jessie's Avatar
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    Re: Leaking 5-speed drain plug

    Back to the original problem of a crack around the drain plug. I once repaired on of these by jb welding an adapter/reducer into the drain fitting. Now the oil takes longer to drain but it seems it was a good in situ repair.

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    Yoda Jim_Gruber's Avatar
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    Re: Leaking 5-speed drain plug

    Interesting fix Trevor. Driveshaft gets dropped off tomorrow for check on rear seal. Hope this fixes my noise. Drew on the other hand this may be a fix for you.
    Jim Gruber - Tampa/Riverview FL
    Bugsy I - '68 Sprite w BE Bonnet - Gone but not forgotten
    Bugsy IV - '60 Bugeye - 1,275+.040 and a 5-Speed - CA Car - 2nd Owner from new -

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    Moderator drooartz's Avatar
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    Re: Leaking 5-speed drain plug

    Thanks for the tips. My plan now is to swap my spare trans in and see what can be done with my broken one. Worse case is it becomes a donor for internals.
    Drew Frink
    '59 RHD Frogeye Sprite - "Penny" under restoration
    '66 RHD Morris Minor - "Maggie"
    '70 RHD MGB
    '06 Triumph Bonneville T100

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    Re: Leaking 5-speed drain plug

    I spoke too soon, Drew. Sorry, but the rear extension that I will need has the drain plug in it. The transmission I have slated for overhaul in my white Midget has a very worn rear output sleeve. Gears on the layshaft have been chewing some aluminum in this one as well. I imagine it can be shimmed.

    Kurt
    65,66 Midget
    57 Berkeley, MGA
    Working on quality rather than quantity

  7. #27
    Moderator drooartz's Avatar
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    Re: Leaking 5-speed drain plug

    No worries, Kurt, thanks for looking. I'll dust off my spare and get it prepped to go in the car.
    Drew Frink
    '59 RHD Frogeye Sprite - "Penny" under restoration
    '66 RHD Morris Minor - "Maggie"
    '70 RHD MGB
    '06 Triumph Bonneville T100

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