Corona ST141 gearbox model

**Sam_Q** · 05-08-2010, 08:43 AM

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.

**RONA** · 05-08-2010, 08:47 AM

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.

**Sam_Q** · 05-08-2010, 08:51 AM

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

**CELICASUPRA7M** · 05-08-2010, 09:10 AM

they had borg warner 5 speeds as well.

**Shifty** · 05-08-2010, 09:11 AM

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

**Shifty** · 05-08-2010, 09:12 AM

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!!

**RONA** · 05-08-2010, 09:15 AM

Originally Posted by Shifty

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.

**CELICASUPRA7M** · 05-08-2010, 09:19 AM

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?

**Sam_Q** · 05-08-2010, 05:03 PM

Originally Posted by CELICASUPRA7M

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?

**Mickey H** · 02-11-2010, 11:07 PM

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)

**Rhyno** · 03-11-2010, 05:41 PM

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

**beerhead** · 04-11-2010, 10:13 PM

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.