Help! R32 Gtr Drive Train Problems

[IDO 11S R32]

HI guys, today when driving my R32 GTR I noticed that when turning at low speed the car would stop. I have checked it by driving in a car park, and it seems like the rear diff is locked, when you turn the inside wheel has to break traction, therefore requireing more throttle to turn the car, it goes fine in a straight line, there seems to be no diff slap or knock. I have had the car for about a month now but have never noticed this before. Is my diff about to shit itself or is thos normal, I called a couple of workshops but they want to see the car, they said it may be fitted with an aftermarket diff, if so I think it would be strange that I haven't noticed it till now, I drive the car every day? Has anyone else had a similar problem? The only recent mod I have done is fit a Tourque split controler. The car drives fine but whenever you turn, wheather going forward or backward it now requires extra force to move the car? HELP?

Edited October 3, 2007 by IDO 11S R32

[IDO 11S R32]

I have done more testing, I have found now that it is not the rear diff, as stated I recently fitted a TSC (tourque split controler) maybe I have done something wrong, when I run it in 2WD mode the car runs fine and the diff works fine, when I run it in 4WD mode and take off, the front tourque indicator guage goes to 50, no matter how gentle and you can feel it load up. When I reverse it does the same thing but when I try to turn and reverse it locks up. Now could this be the TSC confusing the ATTESSA system or could I have a problem with the transfer case??????? Has anyone ever fitted a TSC and had simmilar problems?

[R31 Gagz]

Hey,

I have an R32 GTR as well, the rear diff is an LSD (Limited Slip Differential) which on tight U turns will cause the inside wheel to slip a bit as its trying to turn the same amount as the outside wheel, you will notice this happening a lot on gravel surfaces. It does sound like you may have a problem though, the torque gauge shouldn't be going to 50% on gentle acceleration and it sounds like you have to force it in U turns (or is it even in just normal turns?), I would double check your TSC installation like you said. Have you checked your ATTESSA fluid level recently, don't know it would cause these symptoms but always good to eliminate as much as you can from the equation.

Cheers!

Gagz

[blind_elk]

Strange as it may seem, check the connections on the TPS (I think that was what caused my GTS4 to do exactly what yours is doing).

[IDO 11S R32]

Thanks, I will check the TSC connectors again, just for further info it only does this now in reverse and only when it is in 4WD mode, in 2WD mode the car is normal, forward or reverse. It is quite weird, like I said, if you reverse in a straight line it is fine, only when you reverse and turn does it seen to lock up. THe car literally stops and requires about 2000rpm and some clutch riding to get it moving and you can feel that it is struggling. If I cant find anything wrong with the TSC I will disconnect it and see how it goes. I will post the results for information of others. Thanks

[gun32gtr]

did ya try diconnect the tps and see if it does it still

[IDO 11S R32]

No not yet, I havent had time, been busy with work, will do some testing on the weekend and post the results, if I cant get it working I will disconnect it altogether and see how it goes. But I am pretty sure it was connected perfect, I used a soldering iron and heatshrink on all connections, but will have to check them.

[gun32gtr]

yeh just have to check again to eliminate tps hope all goes well mate

[IDO 11S R32]

Ok, I have done some testing an elliminated some things, I changed the diff oils and gearbox oil, I checked the wireing to the TSC and found that it has all been done correctly. What I have found was that when taking off from a standing start it goes to max front torque and stays there until I accelerate, If I try to turn the car while it is like this then it all feels locked up, especially in the rear, its as if I have a locker diff with the inside wheel skipping as I turn. However if I accelerate so the front torque goes down to normal then I can turn the car and it is fine. So I think that I either have a problem with the ATTESSA computer or the TSC is no good? Has anyone ever had this problem???? I have also recently put new tyres on the front but they are the same size and brand as the rear, so the fronts are 100% and the rears about 30%, but surely this wouldnt affect the ATTESSA. If anyone has any ideas please let me know, the next thing I will do is disconnect the TSC altogether and see if that works.

[blind_elk]

I checked the wiring to the TSC and found that it has all been done correctly.

Not the bloody TSC - the TPS (Throttle Position Switch)!

I have also recently put new tyres on the front but they are the same size and brand as the rear, so the fronts are 100% and the rears about 30%, but surely this wouldnt affect the ATTESSA.

The rears will now be rotating faster than the fronts (smaller rolling circumference) so the ATTESSA will think you have wheel slip. Try swapping front - back.

[aaroncuddy]

Did anyone end up working this out mine doing the same after engine rebuild