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Location:
Brisbane
Registered:
May 2002
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RT142 Corona diff
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Mon, 22 September 2003 02:33
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Hi all,
I spent Saturday scrounging at the wreckers, mostly looking for an RA65 so I can steal its diff. I didn't have any luck, however I did find an RT142 Corona which has the same 22R-E engine as the RA65 and the IRS setup looks identical as well. This leads me to believe that the diff may also be the same (ie 3.5:1 F series), BUT there was no axle code on the build plate! 
So my question is, does anyone know what diff type/ratio is found in an RT142 with an automatic transmission? I'm getting desperate for a 3.5:1 diff but I don't want to fork out $200 for this one only to discover it's a T series!
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 03:28
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Norbie... RT-142 corona's fit into two distinct categories AFAIK.
1/ Local made/built. Has craptacular live axle BORG WARNER grinding diff. Usually you find them with discs, but some have drums (like the ST-141 does)
2/ Fully imported (usually "Avante"). These have complete IRS F series rear end!!. Nothing IRS was made in australia by borg warner, and nor am i aware of a T series IRS....
If all else fails norbie, take a trip to your local library, and borrow a Corona workshop manual!
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 03:38
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Hooray, this is some good news! I still need to know the diff ratio though... any ideas?
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 03:44
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Only the magic books at the library can tell u that!  Cos i really don't know...
P.S. $200!?!?! faaarrrrrk. Can't u just tell them its from a 1984 corolla or something?
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 03:46
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As soon as they realise it's IRS, the price suddenly goes through the roof.
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Location:
melb
Registered:
June 2003
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Re: RT142 Corona diff
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Mon, 22 September 2003 08:45
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sa 63 have a t series irs diff set up.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 11:11
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wow, thats cool 
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Location:
Melbourne
Registered:
May 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 12:20
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I usually look stuff up on Drive.com.au
they have neat details like power, weight, compression ratio, track, options adn final drive ratios.
Actually it's pretty comprehensive. Although it's not always accurate, like my infotech teacher said, garbage in, garbage out.
If it is a f-series you'll be smiling, i'll let you find out the ratio.
http://www.drive.com.au/buy/market_value/car_detai ls.asp?nvic=LC9&make=TOYOTA&model=CORONA&a mp;series=&year=1987&body=
You could probably buy a whole Corona for not much more than $200, just find one with a stuffed head gasket. 
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Location:
Brisbane
Registered:
June 2003
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Re: RT142 Corona diff
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Mon, 22 September 2003 12:29
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norbie if you're right, and its a 3.5:1, im interested also!
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Mon, 22 September 2003 13:37
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"Final Ratio 3.42"
Noice!
I reckon I'll be visiting that wrecker again on the weekend. If they don't want an arm and a leg for it, it's MINE ALL MINE!!
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Location:
Sydney
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 01:45
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ok, according to my book that came with my car, a 2.4L sedans had the irs rear end. which to my knowledge is a F series. I've gotta take the cover plate off my diff to redo the seal there so I'll be counting and measuring etc when I do that, I also wanna know what gearbox is in the car, w55/57/58??
but the diff ratio has to be either 3.7 with a w58 or 3.5 with a w57/55 by my shoddy maths.
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Location:
PNG
Registered:
June 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 02:28
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Gidday
Unless Toyota had different rear ends the diff for a rt141/2 is a BW 21 spline diff - no stronger than a T series.
Craig
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Location:
c'town, NSW
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 02:36
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the avante RT142 is imported, no BW gear on there
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 02:57
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yeah, like i said there are TWO types of RT-142's. The imported with the complete IRS F series, and the local with borg warner ( ) live axle rear.
P.S. Bugman - you will have a W55 in there... looks the same on the outside as a W58 (and is) but has an alloy sandwich plate. Hence you'll have a 3.5 ratio!
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 03:11
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| Bugman wrote on Tue, 23 September 2003 11:45 |
I've gotta take the cover plate off my diff to redo the seal there so I'll be counting and measuring etc when I do that
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Ooh ooh ooh!! When are you planning to do this?
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 03:49
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I had the cover off an RA65 auto on the weekend....worked out to 3.7:1.
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 04:20
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Cool, didn't know the autos had a different ratio. I still can't find one though, auto OR manual. I had no idea these things were rare, but apparently they are!
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 05:49
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Do you just want it for the gearset?
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 23 September 2003 10:38
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Yep! I need a taller ratio for the Supra, preferably 3.5:1 or 3.7:1, and no-one seems to sell them new so second-hand is my only option.
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Location:
Sydney
Registered:
May 2002
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Re: RT142 Corona diff
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Tue, 30 September 2003 03:51
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I plan on doing it this weekend (long weekend) depending on work g/f etc... my car is a manual 1985 avante
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Registered:
April 2003
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Re: RT142 Corona diff
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Thu, 01 April 2004 04:07
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I have a 1986 corona CSi IRS with the 2.4L. Does any one know what diff is in it, as far as i was aware it had an IRS borg warner. i'm looking for a lsd to replace my old diff but i don't know what car i can get one out of. i want to kep it IRS with rear disc brakes.
cheers
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Thu, 01 April 2004 04:36
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There is no IRS Borg Warner diff (not in Coronas anyway); if you have IRS it's a Toyota diff, and since you have the 2.4 litre engine if will be an F series diff, same as the RA65 Celica and MA61 Supra. LSD centres can be found second-hand or new; as a matter of fact there's currently a group buy for F series TrueTrac's, so you might want to get on board!
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Registered:
April 2003
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Re: RT142 Corona diff
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Thu, 01 April 2004 04:44
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i'm interestd but what do you mean by group buy?
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Location:
Brisbane
Registered:
May 2002
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Location:
Brisbane
Registered:
June 2003
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Re: RT142 Corona diff
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Thu, 01 April 2004 08:45
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norbie, how desperate are you...i might sell mine depending if i can find an xj12 lsd...
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: RT142 Corona diff
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Thu, 01 April 2004 08:47
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Norbie wanted one in September  He has a Truetrac remember?
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Location:
Brisbane
Registered:
June 2003
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Re: RT142 Corona diff
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Thu, 01 April 2004 08:49
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doh...this is one damn old thread!
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Location:
Melbourne
Registered:
August 2003
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Re: RT142 Corona diff
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Sun, 04 April 2004 03:28
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chubbylover: *insert thread mining smilie here*
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Location:
Central Coast
Registered:
January 2005
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Re: RT142 Corona diff
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Thu, 20 January 2005 09:50
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hey guys I am after a borg warner diff out of a corona that is disc brake rear..
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Location:
Brisbane
Registered:
May 2002
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Re: RT142 Corona diff
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Thu, 20 January 2005 12:00
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Really? That's great!
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