Big Awd Problem! Need Help

[stiffler]

hi guys hope someone can really help here, I've got a 1994 r32 gtr and ever since i got it it had an issue with the torque gauge (at least i thought it was the gauage back then) where it would show torque going to the front wheels prematurely. Back the the car was pretty much standard with 7 pounds boost and the issue didnt really make the car drive different.

Now the car has 20 psi and ive nearly lost control twice because of this issue. Basically the front wheels apply too early and to the best of my knowledge and according to the torque guage the front wheels seem to be engaging according to boost. even at a pound or two boost i notice the guage come on and under full boost the front wheels spin while the rears still have traction. Ive changed tyres and it did not fix the issue and yes all 4 where changed with the same brand and spec/size and it didnt help at all. I can hear the pump prime when i turn the car on and i thought that maybe the system wasnt bled properly the first time when i got it so when i changed the clutch me and a mate bled the system and it works the same as before.

Please help as it affecting the driving and my safety and i woould love to have the car drive the way it should

[Duncan]

well...that is extremely strange. wheelspin at the front but not rear is pretty much unheard of, unlike many 4wd systems, attessa cannot put more than 50% to the front.

so unless you have some crazy wheel alignment (you already said you now have the same tyres all round), I think it is most likely to be a diff problem. It is possible you have a different ratio diff front to rear, and that might cause the issue you are talking about.

best to get a good workshop to check it out. if you want to check diff ratios yourself, get the car off the ground, and have 1 person turn the rear wheels while 1 person watches the tailshaft turn. You should get 4.1 turns of the tailshaft for 1 turn of the wheels if it is a standard diff. The most likely other options are 4.4:1 (gts4), 4.3:1 (stagea) of 3.8:1 (r34 gtr, I think)? Then try the same test on the front wheels. Different ratios front and rear will be a disaster for attessa, it is designed around rear wheel spin and moving to the front, never front wheel spin.

BTW that is all assuming you don't have a 1000hp drag car. If you do....you will have to work it out for yourself