R32 Grt Chugging In 4Wd Mode After A Certain Speed Is A Achieved

[danny14]

hey guys my gtr 32 is chugging when goin about 80 kms it only does it in 4wd mode

is it because car too low ??

what could it be its deff in drive chain not engine weird

please help if ya can

[JonnoHR31]

got the same size tyres all round?

[DVS JEZ]

As above. Also check attessa fluid and codes

[danny14]

diff size tyres from front to back .. but it has always done it a bit and got worse now only in 4wd really annoying

but i had squeak in suspension checked and they said it sitting on bump stops at front

fluids are fine i repalced some copper washes at attessa pump because was leaking .

whats best thing to do ?

[DVS JEZ]

Get 4 tyres and rim the same size to try. This SHOULD fix the issue. I had the same issue in my old GTR.

[Moodles2]

diff size tyres from front to back .

A problem right there (not *the* problem though I don't think), ATTESSA expects same size tyres all around (best to stick to same brand).. even with the same brand tread difference between front and back can trip ATTESSA up. ATTESSA wasn't meant to be run fulltime, even if it's a tiny bit from the tyre difference the damage to the transfer case (clutch packs in particular) might already be done.

[heller44]

Even when I had 235/45/17's all around, with the new ones on the front and worn ones on the back it was enough of a difference to produce this effect.

What rims and tyres are you running currently?

[blind_elk]

diff size tyres from front to back .. but it has always done it a bit and got worse now only in 4wd really annoying

Shouldn't ever do it in 2WD mode. As per the several thousand other threads that discuss this problem, the ATTESSA thinks the rear wheels are slipping, because they are smaller rolling diameter than the fronts, and therefore rotate faster.

I am still at a loss as to how many times we have to tell AWD owners to match the front and rear wheel / tyre sizes.

[heller44]

About the same as how many people pop up and try to sell staggered sizes to owners of 4wd skylines.

[danny14]

im running stock gtr rims i think rear tyres are wider than the front

i wil have to change them