The LSD thread, should we proceed?

[Jowett Engineering]

We have spoken with a couple of different companies about producing a non-locking traction aiding differential. After much research, and plenty of personal experience, we are leaning towards a type 1 torsen differential. It is unfortunately the most expensive type to produce, but IMO the high torque ratios available make it the better choice. Price would likely be in the $750 - $950 range. It would be a lifetime unit, though, no clutch packs to wear out. A less expensive type 2 could probably be produced in the $500 range.

So if we are to move forward with this, I need serious commitments. Please post here and PM.

[minezmine]

i'm interested in something, I do have a limited understanding.

Please, help explain the difference Pro/Con's of these vs ARB locker.

[captgnarley]

I'm interested. I'd like some more info. What is a non-locking diff? Is that the type engages with a switch?

[mendonsy]

The Torsen type 1 seems to me like a better choice than any locker. Would I spend $750 for either one?? Probably not.

[DawgBonez]

I'm all for it....
although it's probably nonissue, but I am concerned about if it would burn up the ALSD thing-a-ma-jig, when on super slippery terrain..... I could see ALSD over working in slippery scenarios...

[porkshop]

if you can keep the torsen in that price range you can count me in.
great street diffs.

[rockstate45]

Now why couldn't Toyota just offer one from the factory like everybody else!?

-rockstate

[Someguy123]

im pretty much sold already. but what type do you plan to engineer?? is it a worm gear like the quaiffe LSD??

[joepersad]

If the computer kicks in after breaking traction then we will suffer the same sluggish bottom end leaving loose dirt to pavement. we need some sort more like an eaton LSD that will bias torque with out waiting for wheelspin to wake up and do something because the computer will take action long before that happens, a proactive limited slip so to speak Just my $.02

[porkshop]

the torsen will react instantaneously to torque transfer so the alsd will not have time to react unless one wheel has no traction whatsoever(in the air ).
only drawback is relative fragility to high impact torque inputs but having an automatic lessens this to a large extent.
looking forward to it for sure.

[Jowett Engineering]

Thanks porkshop, you covered it pretty well. As you mention, the only downside is no torque transfer with zero traction, one wheel in the air or ice. If one wheel found zero traction, the ALSD would kick in and cause the Torsen to function... it probably wouldn't take much brake to the spinning wheel to cause the torque transfer. This is an excellent article and even compares to the ARB.

The Torsen in the Hummer

Toyota used a Torsen Type 1 in the Supra Turbo, it holds quite a bit of power before blowing.... and it's a 8.7" diff... Which ironically is used in the front of our trucks. IMO a 10.5" Torsen would survive with very little issue behind the 550ft/lbs of a TRD SC. Here is the post discussing the front differential.

Front 8.7" differential info

Someguy123, the Quaife is a version of the Torsen Type 2. I ran one in my VW Corrado (until it was replaced with AWD).

[ChitownTundra]

Sounds like a fantastic option. I would purchase one of these come next summer for sure.

[Sid Post]

I would prepay for $750 ...

How's that for a no-tire kicking offer? If it pushes $1,000, I would need to wait until after the Xmas bills are cleared otherwise, I'm buying my own Xmas present ....

[porkshop]

lets get this thing off the ground already.

[Horseworks]

I would also be interested in a type 1 torsen differential.