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The mkiv Supra Owners Club

OS Giken big LSD kits £900 plus VAT


Chris Wilson

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Chris, how road friendly are these compared with the TRD units?

 

I am going for a fast road set-up and was leaning towards the TRD, as I thought the Giken was designed more for track use?

 

Also would this be suited for the B03b large case manual j-spec enclosure?

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They are fine on the road, but you must use the correct Giken oil. They are for that large case, so that's fine. There must be quite a few people on here with these fitted who can comment on how they find them, I myself have fitted a good number.

 

Mine is getting fitted so will let you know in a week or two :)

 

Guys in US who have them installed

 

http://www.supraforums.com/forum/showthread.php?968026-LSD-options

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Chris I was talking to OsGiken USA and they also have an alternative oil, just good to know if the OsGiken Oil was hard to get

 

http://www.mkivsupra.net/vbb/showthread.php?328829-OsGiken-Spec-x&highlight=osgiken

 

 

For oil we have two approved and tested fluids to work with the differential.

OS Giken 80W250R and Motul Gear Competition FF 75W140

No LSD Additives required

 

In terms of break-in there is no "break-in procedure" (ie. Figure 8’s) but a recommended fluid change between 500-1000 miles or one track weekend after install.

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My VVTI TT6 comes with a factory spec'd B03B large cased LSD.

 

Although it's the only one I could find that had this from the factory, it's mated to V161.

 

 

Pete I'm guessing you have a A02B or A02A if non LSD, as the manual cars came with the A03B in facelift guise.

 

Thanks for the reply Chris, I'll be in touch no doubt shortly :thumbs:

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Mine is getting fitted so will let you know in a week or two :)

 

Guys in US who have them installed

 

http://www.supraforums.com/forum/showthread.php?968026-LSD-options

 

Keep us updated. Just about to buy one too.

 

Clearly well made and as you said no need for a break in. From their site...

 

"Due to the precision manufacturing, high-grade materials, and unique design, a break-in period nor rebuild is required for OS Giken LSD’s. OS LSD is purposefully over-engineered to offer the best performing, most durable clutch-type LSD available"

 

Different Diff type info here guys from SupraForums:

 

JDM:

 

SZ 5-spd and Auto---- 4.083:1, LSD optional (but rare) small diff, small flange, Code A01A

 

SZ-R with V161 6-spd---- 3.769:1, LSD optional but usually fitted, small diff, ???? flange** Code A02B

 

RZ Auto & All GZ---- 3.769:1, LSD optional*** small diff, big flange, Code A02A (non LSD) Code A02B (LSD)

 

RZ 6-spd 93-5/96 (V160)---- 3.266:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover, Code B03B

 

RZ, RZ-S 6-spd 6/96-2002 (V161)---- 3.266:1, LSD standard small diff, big flange, normal diff cover **** Code A03B

 

 

European Spec:

 

TT Auto 93-96 EU spec----- 3.538:1, LSD standard, big diff, big flange

 

TT Auto 93-96 Austria/Switzerland Spec---- 3.266:1, LSD standard, big diff, big flange

 

TT 6-spd 93-96 EU spec: 3.266:1 ---- LSD standard, big diff, big flange, fittings to suit external oil cooler.

 

And James on here put this up a while back when looking at VIN/Chassis plate.

 

AXLE Example Description

 

Crown Wheel Size A A (8'' - 200mm), B (8.7'' - 220mm)

Differential Ratio 01 01 (4.083:1), 02 (3.769:1), 03 (3.267:1), 04 (3.538:1), 05 (4.083:1)

Differential Type A A (Standard open differential), B (Torsen LSD), D (Torsen LSD)

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My GTS-t was one and a half seconds faster around Oulton in the dry and faster still in the wet, JUST by swapping out the appalling Kaaz LSD for the OS Giken, a few preload experiments gained another half a second. I was amazed, that's a MASSIVE time difference from an LSD swap. Since I was taleked into trying one Giken have now been "discovered" by many high end race teams and a lot of fancy saloon and GT race cars have them fitted worldwide. They really are THAT good. Only comparable LSD is the lovely Tracktive ones, but they don't list a Supra type unfortunately.

 

The difference between a Torsen and a proper plate type LSD like the Giken or discontinued TRD is night and day. OE makers like Torsens as they are silent, no maintenance and cheap to make.

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