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I supported Toymods
Location:
NE Melbourne
Registered:
May 2002
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S3 RX7 diff into TA22
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Mon, 05 August 2002 11:39
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who knows if this is a smart option.
i was thinking about possible diff swaps for early RWD toyota's. i was thinking RX7 diff for a few reasons. it is LSD, Disc Brake, same stud pattern. i know it's a watts link, but with the watts mount on the front of the diff, it would not be difficult to leave it unused and just use the panhard rod setup on the rear when the mounts are swapped over. another very nice option is the Guru Racing Torsen diff centres that can be bolted in and at a cost of around $1000 for a torsen centre, sounds like a nice option!!! that and the diff itself can be had for very cheap... like $400 disc to disc!!!
now the only thing that need to be seriously considered is the width of the diff itself, and would it need to be shortened to fit say a TA22??? has anyone ever looked into this??
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Location:
Colac, Victoria
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 05:00
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Never heard of a rx7 diff being used - though the ones ive seen most often are Hilux LSD's - hiace LSD's and the borg warner 8.somethng LSD from skylines and commodores
i remeber seeing one borg warner setup being made for about $1400 dollars
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Location:
Montrose, VIC
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 05:07
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Old school RX7 setup was something I actually looked at, because of the availability of that aftermarket Torsen LSD centre for it. In the end it was just going to be far too damned expensive, so I went with the borg warner 78 instead. Look under 'ae86 front brake upgrades' post for more info. As I remember it cost me about $700 for the diff work including new bearings, shimming up the LSD, new 4.11 gears, shaving a few mm off each side on the housing, and whatever else I got done. R31 skyline complete rear end was $250 (might be able to get one cheaper than that though), and VS clubsport diff (for LSD) was $250. For about $1500 you can get a KAAZ lsd centre for these diffs too, if you'd like something a little more exciting.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 05:09
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$1000 torsen centre? damn, wish I'd seen that one when I was looking for that stuff... Sure that's everything though? Or just a 'can of gears' and nothing else (e.g. crownwheel+pinion, bearings, etc.)?
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I supported Toymods
Location:
NE Melbourne
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 06:19
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yeah, the torsen centres are just a "can of gears" they bolt onto the existing crownwheel, and accept the stock axles. another cool thing about these old school RX7 diffs is that Guru Racing also make fully floating hub for them. so the fitment of nice big fat floating billet axes can make for an almost bullet proof rear end. expensive, yes, practical for the street, no. but hey, i though it'd be a good idea to choose a rear end that has such parts locally available and relatively cheap!!! and get this, with some small amounts of modifications, a S4/S5 RX7 rear vented twin pot disc brake setup can be fitted. who said awesome brakes???
as for the conversion itself, i fail to see how it's any more expensive than any other setup. as long as the width is not too far out (my friend has a S1, same diff, and width looks alright) then the change over of the toyota brackets is just to be expected with any conversion. and with disc brakes and correct stud pattern stock on the RX7 diff, how can it be more expensive than a shortened, redrilled, brake converted hilux diff?? anyway, this is getting a bit off the topic, and the info i'm actually after...
mrshin, when you looked into this conversion, did you happen to go as far as comparing the width of the diffs. if so, could you help me out with this???
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 08:04
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If you get the right Hilux diff it does'nt need to be shortend to fit the TA22!
I would use the Hilux diff if i could figure out how to change the stud patten and fit disks!
Anyone know how to do this?
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I supported Toymods
Location:
NE Melbourne
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 09:36
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that's the first i hear about a non shortened hilux diff into a TA22. if it is a possibility, which i'd be quite surprised about, then it would make a good option, however, it still doesn't help me out with knowing the width on an RX7 diff.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 12:17
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Well I cant help with the RX7 diff 
But I have been told many times that the G series Hilux diff is'nt much wider than the TA22 item 
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Location:
Brisbane
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Wed, 07 August 2002 22:43
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G series diffs come in many different widths. I spent a day at a wrecking yard with a tape measure and I found one that was close enough to the same width as my RA23. This is definitely a better option than cutting down a wider diff!
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 01:32
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I thought one of them was close! But how can the drums be replaced with disks?
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Location:
Montrose, VIC
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 04:08
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gonna hafta redrill the hubs, find suitable discs, and get creative with making brackets etc. to get some suitable calipers on there. Don't forget the handbrake 
I don't happen the know the width of an RX7 rear end, I never actually got that far as to actually start measuring parts, rang up a few places about getting the parts and decided it would end up too pricey. Sorry!
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I supported Toymods
Location:
NE Melbourne
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 04:12
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the best i can do is say that according to the Haynes manual for RX7, the rear track is 1400mm. an complete disc to disc LSD setup can be had for around $500-$1000. that's not too bad, so for i still fail to see how it could end up any more expensive than any other option... i will look further into it, as i'm quite interested now...
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Location:
Colac, Victoria
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 04:19
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Norbie - Which Hilux diff was that ???
Curious to know - if it only means minor track modifications or a little extra flaring of the fenders at the back .. Mine need doing anyway ( flaring )
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Location:
Montrose, VIC
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 04:22
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Flares are awesome 
Go out and find a diff thats about 200mm/side too wide, the make the flares. There had to be something good on an SL/R 5000 Torana! Studded flares and reverse scoop get my vote every time  Go the MA61 
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Location:
Colac, Victoria
Registered:
May 2002
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Re: S3 RX7 diff into TA22
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Thu, 08 August 2002 04:29
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mine only need a little lipping - about an extra half inch outward to give clearance for 205's at the back ... just subtle - not bolt on's
i like the way ra23's have it done - looks tuff
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