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Thread: Corona ST141 gearbox model

  1. #1
    Senior ****** Carport Converter Sam_Q's Avatar
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    Default Corona ST141 gearbox model

    Hi, I am looking to know extactly which gearbox is in the ST141 5 speed Corona, I know that it's made by Borg Warner but what I want to know exactly is the model number or which other cars have the same gearbox internals.

  2. #2
    Junior Member Too Much Toyota RONA's Avatar
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    Default Re: Corona ST141 gearbox model

    The 5 speed was only optional in the ST141 it came standard with 4 speed manual. RT142 has a W55 in it so I'm guessing the optional 5 speed in the ST141 was the same.
    If in doubt power out

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    Senior ****** Carport Converter Sam_Q's Avatar
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    Default Re: Corona ST141 gearbox model

    well if thats the case it would suck, so which model 4 speed might it have then?

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    Nothing but a filthy Conversion King CELICASUPRA7M's Avatar
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    Default Re: Corona ST141 gearbox model

    they had borg warner 5 speeds as well.
    1983 Toyota Celica Supra

  5. #5
    Incompetent Automotive Encyclopaedia
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    Default Re: Corona ST141 gearbox model

    Yep it's a bog warmer not an Aisin/Toyota thingamy

    Not worth fixing or getting parts for, buy another one for $30 from a wrecker
    Must.... avoid.... urge... to... upgrade... parts I haven't.... used.... yet.....

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    Default Re: Corona ST141 gearbox model

    Oh and yes the ST141 5 speeds were also a borg warner...

    ...and for the last fricken time RT142s have W58s, or certainly the three that I've had were W58s!!
    Must.... avoid.... urge... to... upgrade... parts I haven't.... used.... yet.....

  7. #7
    Junior Member Too Much Toyota RONA's Avatar
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    Default Re: Corona ST141 gearbox model

    Quote Originally Posted by Shifty View Post
    Oh and yes the ST141 5 speeds were also a borg warner...

    ...and for the last fricken time RT142s have W58s, or certainly the three that I've had were W58s!!
    Dude I had one it had a W55, the ratios were very different to the W58 in my MA61. First, second were very short in comparison and that was despite having a taller diff ratio.
    If in doubt power out

  8. #8
    Nothing but a filthy Conversion King CELICASUPRA7M's Avatar
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    Default Re: Corona ST141 gearbox model

    the rt142 i wrecked didnt say what box it had, has alloy sandwich plate tho so its not a proper w58, ie no stronger than 55/57 just diferent ratios?
    1983 Toyota Celica Supra

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    Senior ****** Carport Converter Sam_Q's Avatar
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    Default Re: Corona ST141 gearbox model

    Quote Originally Posted by CELICASUPRA7M View Post
    they had borg warner 5 speeds as well.
    just what I have been wanting to hear thanks, now if anyone knows if the gearbox has a model number. The only transmission listed on wikipedia from Borg Warner from that year is a T5.

    So I assume they feature a cast aluminium housing?

    Also why does everyone hate these boxes? whats so bad about them?

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    Default Re: Corona ST141 gearbox model

    This is a screenshot of a gearing calculator spreadsheet, with the Corona Borg Warner gearbox ratios.

    The only difference between the 4 speed and the 5 speed is the 0.86 overdrive, all other ratios are the same. I got this information from a service manual, no idea on the actual model of the gearbox. Not a bad box, but freeway cruising in top gear is pretty annoying (I have a 4 speed)

  11. #11
    Junior Member Backyard Mechanic Rhyno's Avatar
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    Default Re: Corona ST141 gearbox model

    Sammy,

    Are you still hunting this one? My old girl has a ST141 with a 5 speed, I can crawl under there with a flashlight if your still chasing?

    IMO there is nothing bad about the gearbox, having broken 1 and changed a clutch in annother. They put up with plenty of abuse from the "mighty" 2SC... haha and make a good first car for any kid.

    Go on Burn me, its just my 5 cents haha

  12. #12
    Junior Member Backyard Mechanic
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    Default Re: Corona ST141 gearbox model

    If they're a T5 they suck for paddock bashing, you get grass stuck in the external shifter mechanism and end up loosing gears till you burn out the grass that gets stuck

    The theory I heard why everyone hates them because they don't change gears happily at 7000rpm, 70's syncro tech isn't very inspiring.

    I've seen a W box take a 500hp 350chev for over a year now, and you can break those early borgy boxes with a 202 and a quick skid.

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