should it spin the wheels

Launched my R today showing a friend what it can do..

And it left a lovely number 11 from the front wheels .

was holding at 4200rpm and fed clutch in .
Is this normal behaviour?

Mine doesn't, what tyres and size?

Yoko parada spec 2 .  215/something /17
Standard ride height ,  front suspension is solid rear is softer .. Gab rally shocks
Left two black lines  drivers side one about 3 ft long the other 10 ft

Does have launch control aswell

no shouldn't spin front wheels
that means you probably have a problem with diff
attessa system should grip once slip is detected on one wheel and diffs engage 4wd so if anything all 4 should spin up same as the gtr

So... What do i need? Gearbox has been rebuilt know that ..

But transfer box don't think so

Might explain why when i put my foot down in first it feels like it's torque steering a little

...

Thinking my clutch and turbo fit will wait till winter and box will be getting new parts

Just out of interest... Dous the GTiR have 3 diffs? 1 in gearbox, 1 in transfer box & rear diff?

I always get confused when people say Diff coz theres more than 1

I have a very good cond front dif for sale rob

No 2 diffs gaz front and rear. gearbox isn't a diff box mate

So us that the diff from the box? Or transfer case

Glenn i think you might have just sold the diff

The dif is the transfer box its a complete unit unless im mistaken? Bob will correct im sure if wrong   

Rear diff front and center diff rear is rear front is transfer box and center is in gearbox

Wont help ur rear shocks are softer than the front car will sqwat down at rear

There are 3 diffs front,center, and rear,front is in transfer box and is an open diff and center is in gearbox which is a viscous diff same as rear.

If you are lightling both fronts up at the same time it might imply that it has a front lsd as an open diff I think will mostly only light one up at a time.

At the same time if its only the front spinning with the rear doing very little its proberly the viscous fluid in your center (gearbox) diff past its best.

Worth a Fluid change first?

The fluid is actually in the center diff.

I am sure it is proberly possible to change this fluid and have a vague memory of possibly 00sid on the oc getting the fluid changed on his,but this is a very specialist job and would be very expensive to do.

You also need to know what thickness fluid to use as this could alter the way it transfers the torque to the rear.

I will proberly get this wrong but this is how I think it works.

Basicly I think the gtir is fwd bias and all that transfers the power to the rear is the drag from this viscous fluid between special plates in the center diff.
I cant remember exactly now but I think there are multiple plates in the center diff some one side of the diff and some the other,when for instance one side start to turn faster than the other the drag from this fluid between the plates will sort of attempt to grab the other plates and lock the diff together/transfer power to the other side of the diff.

When the fluid gets old or over heated from excessive slippage in the past I think it can thin/wear out the fluid making it less affective.the fluid can also leak out of the diff in some cases.

So the centre diff is in fransfer box. . So If i replace transfer box that should fix my issues

Center diff is in the gearbox,its a sealed viscous unit.

Is that something i can change?

Tbh not really unless you change the complete diff,which in itself is another gamble as there all getting on now, and checking one and actually knowing what you are doing is another thing.
Its a specialist job really and the gearbox would have to come completely apart to fit it.

Cut open center diff internals.

These are the plates ...

So what do you suggest?

Depends how bad it is?

Are the rear wheels doing nothing when the front is spinning?

Tbh a lot of gtirs are proberly running about with worn center diffs,its not until you start lauching it a lot you start to notice.

When mine was worn and leaking fluid it would mostly spin the front left,it would still be sending some torque to the rear wheels as it was not losing all its power out the front and when driving normally and not spinning the wheels it was hard to tell there was even a problem tbh.

A worn center just limits how much and how quick the power is sent to the rear,it hard to judge how worn it is tbh.
Really in an ideal situation on a hard launch I think it should atleast light up 3 of the 4 wheels with a decent center diff.

There are a lot of variables here though like grip and power etc and there is only so much a viscous diff can do I think,the more power the worse it will proberly gets as in turn with the open front diff it will always most likely lose traction at the front first, the viscous diff then will proberly slip more trying to handle the extra power and send it to the rear.

Its been years since I have looked into all this stuff but google vicous diffs see what you come up with,some of what I have wrote could possibly be wrong,i am jus going off memory lol

Yes rich is pretty much spot on there
The viscous fluid thins and thickens which allows the plates to slip or not slip this in turn allows the drive to be transferred to the front diff in transfer box which In turn engages drive to rear wheels
So as said before in a different thread it's predominantly a fwd vehicle until slip is detected then engages drive to rear wheels too

So my guess is the centre diff in the box is kaput
I have a good spare one if needed but like the man said you'll need to pull the box apart to fit it