Attessa 4wd Problems?

[IDO 11S R32]

Hi, I have an R32 GTR, when I take off the front torque split goes to max on the guage. I recently fitted a TSC (torque split controller and thought it might have been faulty but I removed it today and it still does the same thing? As soon as the car rolls, either forward or backward it all binds up, the rear diff locks, as if it were a locker diff and the car fights itself to move. When I was reversing on a slight incline today I noticed that the car wouldnt roll dawn the incline when it was running but when I turned the car off you caould feel everything release and the car started rolling down the incline. Start the car and it would all bind up again. Tyres are all the same. I read a post where someone checked for error codes on the ATTESSA computer, can someone also tell me where the computer is and how to check for the error codes. At the moment the TSC has a 2WD switch, and when I leave it in 2wd it is fine, so I am driving around in 2wd mode, I am thinking that this could also mean the the G force sensor in the car is stuffed as this is what the TSC is wired into but this could also be masking another problem somewhere else in the drive train. I have done everthing I can think of to resolve the problem but to no avail. I swapped the front and rear tyres around as I recently fitted new tyres to the front (same brand and size) but was told that the different wear may have caused the problem, I now know this was not the problem. Has anyone had this problem and can shed some light on this for me?????? HELP!!!

Edited October 15, 2007 by IDO 11S R32

[sh@un]

how low is the car, and how much camber do the front wheels run?

[IDO 11S R32]

Dont know, will post a pic, it has coilovers, this is the next thing I will sort out, I noticed today that the drivers side rear is lower then the passenger side rear by about 10-15mm. Dont know if this would effect it, front isnt that low though. I have had the car for about two months and it has only just started doing this I haven't touched the suspension since purchasing it.

[sh@un]

you did try to flush and bleed the AWD recently system though, yeah

[IDO 11S R32]

NO, but did check the fluid level, it is slightly overfull. I recently changed diff and gearbox oils, first I thought I had blown the diff, or it was on the way out at least, but it makes no noise, very little diff slap and works perfectly when in 2wd mode.????

[sh@un]

centre wet-clutch pack may be stuffed

[CeJay]

attessa computer is the silver box on the underside of the parcel shelf, at least on my 4dr gts4. As far as I know it will only flash ecu error codes when the 4wd light is on, signifying an error. Theres a red led on the underside of it.

[IDO 11S R32]

If the center clutch pack is stuffed, how do I fix this? What sort of money am I looking at, and where should I take it to get it fixed? I live in Western Sydney near WSID. How sure can you be that its the clutch packs?

[IDO 11S R32]

Can anyone also give some advice on how to bleed the ATTESSA system? Can I do it at home?

[blind_elk]

Did you check the TPS connection when you asked before about this problem????????

[IDO 11S R32]

Did you check the TPS connection when you asked before about this problem????????

Yes I checked the connections, they are all fine. I even disconnected the unit from the car but it still had the same problem? Took the car to CRD today they dont know what is wrong with it, it is now booked in for next tuesday so they can go over the car and see if they can find the problem. Will let everyone know what it was when we have it sorted.

[IDO 11S R32]

Blind elk, you are a legend!!!!. I have found the problem to my 4wd nightmare. It was the throtle position sensor. This is how it all went wrong. Now my car has had a single throtle body conversion done, why I dont know, but it has been done. On the single throtle body there is no TPS, so when blind elk said to check the TPS I counldnt as there was none. What I forgot that just prior to this problem occurring and in fact the day I installed the TSC I decided to clean up the engine bay. The standard throtle body linkage was still in place with the TPS connected, I dosconnected it and drove the car, it went fine, so I removed the whole linkages. Then the problems started. I didnt even think about this, until today I was in my garage thinking about what the hell could be wrong with it, when I saw the linkage sitting on my bench with the TPS attached and thought, hang on!!!!!! I connected it up and whala, it all works perfect. I reinstalled the linkages and connected the TPS and it all works fine now! And so ends my weeks of hell, however no a massive exhaust leak from the manifolds has emerged, will this ever end!! At least I have planned on changing the turbos to N1 2860R-5, I have ordered them but am still waiting for them to arrive. I will check other forums but there is one on installing turbos right? and can it be done at home or will I need a hoist?

[blind_elk]

No applause necessary . Just throw money