Confirmed Torsen Differential

[Jeff Lange]

Judging from the picture, the differential (case at least) looks to be the same, or similar to the 205mm F20TX differential from the '01-05 IS300. The 208mm differentials used in some of the larger RWD Toyota/Lexus models have a much wider front mounting, and the IS F's differential case has significant external cooling fins. The 208mm (and older larger differentials like the 220mm in the JZA80), use a 3-bolt dampened pinion flange as well, while the 86 seems to be using the smaller, more common non-dampened 4-bolt design.

The 205mm differential is the same as the older Toyota 8-inch rear end used in cars like the A70 Supra, etc., so aftermarket differentials will likely be relatively easy to get right off the bat. Not that the T2 (if that's what it is) will be bad, I love the T2 I've got in my IS250.

Here are a few pictures showing how similar this is to the F20 differential (both open and LSD) from the IS300/IS250:

IS250 factory F20SX / FD20A Semi-Limited Slip Differential:


IS300 F20TX / FD20AT Torsen T2 Limited Slip Differential:




Using this Toyota differential is a good thing, this will take more abuse than most any owner will ever throw at it.

Jeff

[2fast4you]

I mentioned this in another thread, but Torsen only makes four models of differentials: T-1, T-2, T-2R (Racemaster), and T-3, and they are found in a wide variety of cars. The T-2 is found in the IS, LFA, Imprezza WRX STi, Genesis Coupe, the Mustang Boss 302, etc., and will be in the 86/BRZ/FR-S.

And for what it's worth: JTEKT Torsen is part of the Toyota Group.

[Matador]

Originally Posted by Andy

I'm happy about this!

http://www.facebook.com/Tune86com

"Good news! Toyota 86 will feature Torsen LSD and gearbox is from Toyota Altezza / Lexus IS (automatic from IS-F), so we already have tons of spare parts. Almost all suspension is the same as Impreza"

Anybody notice Tada commenting and saying with reference to the Impreza suspension;

All suspension fix points have been modified. This is the point for super performance!

Originally Posted by old greg

And if the ring/pinion gears are as strong as those in the IS's, there shouldn't be any need to worry about it's strength.

Originally Posted by Jeff Lange

Using this Toyota differential is a good thing, this will take more abuse than most any owner will ever throw at it.

Jeff

This right here, is truth.

[Matador]

Originally Posted by viking84

My first post here I actually just joined to ask what kind of diff this car will have - really good news about the Torsen! I assume this will be the same for both variants (BRZ and GT-86)?

I currently drive a BMW 1-series coupe (120d), and fitting a Quaife diff in it last year completely transformed the car! Made this vid right after the run-in period was over, hopefully the GT-86 will be at least as happy to powerslide
[U2b]fLFupcWTdAs[/U2b]

Did not click on that video expecting that musical intro. Good stuff.

[viking84]

Originally Posted by MatadorRacing_F1

Did not click on that video expecting that musical intro. Good stuff.

Going to be hard to find a good tune for the GT86, strangely enough very few people make songs about Toyota's...!

[LSxJunkie]

Originally Posted by Ryephile

Cool.

If it's an existing diff that gives more opportunity for aftermarket options like OS Giken, Quaife, or whatever you prefer.

Unless you're w2w racing, the Torsen is all the LSD you need.

[Mr.Jay]

from the motoiq article the state that its from a is300

[JDLM]

Originally Posted by Mr.Jay

from the motoiq article the state that its from a is300

So pricing on those (8XX-1XXX) not terrible

[fa5tco]

Wasn't the is300 transmission made of wet toilet paper over about 300 whp?

[Jeff Lange]

Even if it was, what does that have to with this thread?

Jeff

[Ryephile]

Originally Posted by LSxJunkie

Unless you're w2w racing, the Torsen is all the LSD you need.

I disagree. Different LSD styles offer varying chassis control characteristics. An ATB needs both wheels to have some grip, otherwise it reverts to full-open. A clutch-pack style needs wheel speed delta between the driven wheels to start locking. In my experience, ATB's work best in the front axle, and clutch-packs work best in the rear axle. Of course, if you're racing, opinion is irrelevant and only lap times matter. On the street, however, perspective and chassis feel are the only relevant statistic. Nevertheless, in a rear-drive car, any LSD from the factory is usually better than an open-diff.

[WingsofWar]

I personally loved Torsen overall, it had good performance and average usability. Much of my Torsen experience was from the FDrx7 and miata. But when it came to track days i found the clutch pack LSD in my FC was more suitable for the task.

[Jeff Lange]

It depends what kind of racing you're doing, IMO. I've driven quite a few of both types, in various cars and they all have their strong points. Road-racing with a Torsen is a delight though, which is why I put the T2 in my IS.

Torsens are great OEM LSD's, they're quiet and feature very smooth engagement. Especially for a Lexus, etc. they're perfect. I think most Toyota/Scion owners would appreciate that. Anyone else would likely want a differential with much more lockup, and would probably not care much for a smooth OEM-style clutch-type LSD anyway, and would look aftermarket anyways.

I've got a TRD 2-way for my AE86, it's going to depend on what you want to do with this car, but with it being an existing Toyota differential, options will be relatively plentiful. I'm sure the A70 Supra guys are liking the fact that new options may soon exist for their cars as well.

Jeff

[fa5tco]

Originally Posted by Jeff Lange

Even if it was, what does that have to with this thread?

Jeff

Well genius. The first page only has 5 posts that mention the transmission. Sorry if I strayed from the differential topicto discuss transmissions in the drivetrain portion of the forums.