Torque transfer to front without hard accel or wheel slip...

[bobbo]

No but how do the "teeth" look on the axle where the ABS Sensor reads? Maybe grease or debris got caught up?
How much torque is getting sent fwd? What does the gauge read? Does it read "0" when stopped?

[halfjap1980]

The gauge reads 0 while stopped. It spikes to 10 or higher on the gauge when I'm driving. Just casual driving without hard acceleration. It also happens while I'm just cruising at a constant speed.

[Voodoo_ChildR32]

Like mentioned above, check the tone rings on the outboard end of the front cv shafts. If they are missing teeth or the gap between the sensor and ring is too large it will cause issues. Also if the shop removed the shaft and didn't know how to do it properly they more than likely pulled the wires out or broke a connection at the wheel speed sensor.


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[Blackcossie]

G sensor.

[Voodoo_ChildR32]

I just put my snow tires on last night, and now my front torque is kicking in way more than usual. I went from 255/40R17's (summer tires) to 225/45R17's (winters). When I hammer it it now jumps up as high as 10 on the torque gauge. My guess is narrower tires = loss of traction and rear wheel slippage.
Anyone else with this kind of issue?

Sorry to thread jack, but thought it fell under the same topic.


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[Fred-R]

Found this link about fixing the G-sensor, it might help...

http://www.skylinesaustralia.com/forums/topic/356654-r32-gtr-g-sensor-fix/

[Rocketeer]

I can tell you right now Kenji, that your problem is definitely not the G sensor. A faulty G sensor would throw up a code on the attessa computer and result in no AWD. You should definitely confirm what the shop had touched and work backwards from there.

Another possible solution, and one Im currently awaiting in the mail, is a Torque Split Controller. Might be a lazy way of fixing your problem, as all it does is allow you to control how much torque your front tires get, so you could just turn it to '0'.

[Blackcossie]

I can tell you right now Kenji, that your problem is definitely not the G sensor. A faulty G sensor would throw up a code on the attessa computer and result in no AWD. You should definitely confirm what the shop had touched and work backwards from there.

Another possible solution, and one Im currently awaiting in the mail, is a Torque Split Controller. Might be a lazy way of fixing your problem, as all it does is allow you to control how much torque your front tires get, so you could just turn it to '0'.

How can you say with certainty that its not the g sensor? If the sensor is producing signals within the original parameters, it will not generate a code. It my be sending a constant voltage to the attessa computer causing it to engage the front axle. I would do voltage test to verify this.

Also with most Attesa controllers you are not disabling the system at the "0" setting you are only using the default Attesa settings. The only way to completely disable the Attesa system is to remove its power supply. If you were to install a controller to fix this problem my guess would be that nothing is going to change as you have only added something that manipulates the original signals.

[halfjap1980]

Lots of good info here guys. Thanks! I haven't had a chance to do anymore work yet due to weather. Hopefully I can get under the car tomorrow and see if anything looks funny.

-Kenji

[madaxgt]

HI

I think I have the exact same problem as you. I recently did a fair bit of work on my car. Change some CV boots on the front....but also swapped out a rear diff all while fitting new turbos. So I did lots on my car where I could have disturbed something. Mine puts on front torque literally following how much throttle I apply. As i move my foot down it applys more front torque. My current solution is to remove #1 fuse so it runs in 2wd.

I thought I had bought a non-gtr rear diff and that the ratios were different front to back but I confirmed its the same ratio as the one I removed so its not that. I will be checking my G-sensor today and see if I get 2.5v on the level for all directions. I havent checked my wheel speed sensors yet but will see what they come back at. I have no fault codes on the attesa either.

Hopefully its something obvious that got knocked....

Let me know if you find anything.

[madaxgt]

Just an update.

I adjusted my G sensor and it was a bit out from the 2.5v its meant to be they were about 2.63. Adjusted all the pots to 2.5v took it for a drive and it made no difference.

Wheel speed sensors next, seems the more likely culprit based on that it adds front torque at 0 longitudinal g on my Field torque controller display (on or off).

[Skym]

From what I understand, if applying some preload to front wheels, that's normal for R33 GTR, R34 GTR (I think result's in removing front driveshaft when want it 2wd, fuse under dash). If have N1 GTR racecar it's set differently to street spec GTR's with 4wd ECU.

In racing they program it so 4wd engages at lower speeds with low G's and not at higher speeds with higher G's on GTR and explain how the 4wd works (G sensor, wheelspeed sensors play a role in the 4wd working or not) -

http://www.youtube.com/watch?v=ZEecHdRHv60

G-sensor (cornering, braking, acceleration loads), tooth drive on rear (rear wheelspin), wheelspeed sensors x4 is what 4wd ECU looks at.

[mitch32]

From what I understand, if applying some preload to front wheels, that's normal for R33 GTR, R34 GTR (I think result's in removing front driveshaft when want it 2wd, fuse under dash). If have N1 GTR racecar it's set differently to street spec GTR's with 4wd ECU.

In racing they program it so 4wd engages at lower speeds with low G's and not at higher speeds with higher G's on GTR and explain how the 4wd works (G sensor, wheelspeed sensors play a role in the 4wd working or not) -

http://www.youtube.com/watch?v=ZEecHdRHv60

G-sensor (cornering, braking, acceleration loads), tooth drive on rear (rear wheelspin), wheelspeed sensors x4 is what 4wd ECU looks at.

What's "tooth drive on rear (rear wheelspin)", theres abs sensors on both wheels but don't recall any other sensors.

[Skym]

What's "tooth drive on rear (rear wheelspin)", theres abs sensors on both wheels but don't recall any other sensors.

I think they are the same part, just a different name for the ABS sensor + teeth part on left, right side of rear diffhead. I think (from memory and could be wrong) ABS, 4wd are inside one ECU on R32 GTR that's located under rear parcel tray on passenger side of car.

[Fred-R]

holy thread revival!

Has anyone figured out what was their problem?

My torque gauge has been acting the same for quite a while and i decided to look further to fix the issue. My Atessa ecu doesnt show any codes aswell. I've swapped the G sensor months ago, nothing has changed. And to answer someone's interrogation as to know if installing an ETS would solve this, it didn't...

I'd like to check the wheel speed sensor resistance ''ohm'' directly on their connector. I,m freakin lazy (just noticed the comma between the ''I'' and ''m'', too lazy to press that ''shift'' button haha) as im writing this to take the wheels one by one to reach to the sensors.

So the thing is i don't know wich connectors to test. They all in the engine bay? Someone can post pics of them? I've searched the net and cant really find where they're located...

tyvm guys