3/S rear differential discussion, the "H", "G", and the "J" specs, is it JDM, US, UK?

**GTOX** · 09-27-2011, 07:38 AM

Originally Posted by Marty K.

To find a 2WS hybrid LSD you need to find a 95+ GTO MR that is been broken for parts.
It was only available as an expensive optional extra, so they are quite rare, but there are some out there.

Just had a gathering here in Aus where one of the cars (99 MR model) had the hybrid lsd, not sure if the owner even knew...

You got pics yeah Mikey?

**GTOJOE** · 09-27-2011, 08:13 AM

I first saw the pics of the diff on Luke's facebook and asked who's it was then realized it was Johns which I already had the VIN number for cus of our Cairns meet a few months earlier

**GTOJOE** · 09-27-2011, 08:21 AM

Originally Posted by IPD

ratio is the same? then explain why the 5-speed rear doesn't work with the atx, but the 6-speed does.

All JDM GTO M/T had the same rear diff ratio. The Auto was different as the box was not a Getrag box from memory but a Mitsu made one.

**Marty K.** · 09-27-2011, 08:29 AM

Originally Posted by MR2

Question: what are the chances that a Diff like that is still intact...considering every Stock viscus is 99% chance expected to be open if i were you Marty I'd be opening it and checking it ASAP.

Thanks.
I will be inspecting it prior to installation.
I also want to give it a good clean up, and paint job.

A friend of mine has one also, we picked up really cheap. Ebay:-)
Seller obviously didn't know what they had, and it was on a 'buy it now'......

I have checked my viscous LSD a few times, and it still works fine.

Marty

**Marty K.** · 09-27-2011, 08:31 AM

Here is mine.

Marty

**Marty K.** · 09-27-2011, 08:54 AM

Originally Posted by GTOJOE

All JDM GTO M/T had the same rear diff ratio. The Auto was different as the box was not a Getrag box from memory but a Mitsu made one.

I can confirm this.....
Ratio is 3.545 for all the manual GTO's, N/A and TT's.
Ratio is 3.307 for the Auto's(which in Japan are 4WD)
Marty

**Emilie@GZP** · 09-27-2011, 10:07 AM

as far as US Spec stuff goes with interchanging.... the JDM 6spd transmission uses a US Spec 5spd rear diff. The JDM ATX AWD trans uses a US Spec 6spd rear diff.

**DocWalt** · 09-27-2011, 05:54 PM

What exactly is the Hybrid diff? A clutched diff combined with the normal viscous?

**GTOJOE** · 09-27-2011, 06:50 PM

Originally Posted by DocWalt

What exactly is the Hybrid diff? A clutched diff combined with the normal viscous?

Originally Posted by GTOX

The Hybrid LSD is a combination helical (torsen-type) and viscous LSD. A torsen type diff will have no limited-slip abilities on sheer surfaces like ice. It'll be as useless as an open diff. But the VCU in the hybrid LSD still allows both axles to lock and spin in sync, even on sheer surfaces. On higher traction surfaces like asphalt, it acts like a normal torsen-type diff, biasing torque to the wheel with the most grip.

As per GTOX's post on the NZ forum.