What Is A Gts4?

[SL33K]

I have read a few threads about GTS4, bt dont know what they are?

how can you know if you have a GTS4?

Whats the difference between a GTS and GTS4?

Any interior or exterior difference?

Engine Difference?

[skyla]

R33 GTS4 Has the RB25DE engine and is 4WD, exterior and interior are the same as a GTS or GTS25, GTS25T

R32 GTS4 has the RB20DET engine and is 4WD, exterior and interior is the same as the GTE, GTS, GTS-T, GTS25

the main difference is the GTS4 is 4WD

Edited November 14, 2008 by skyla

[Hesh]

you may find some people eroneously refering to 4 door models as gts4's though not as often now

[drive2slide]

How do you know which one you have? 7K and drop the clutch.

[Eug]

nice work on the clarification Rach!

also another thing i should point out is not to confuse 4WD (4 wheel drive) with 4WS (4 wheel steer).

[GTS4WD]

and to confuse ATTESSA with a 4WD.

ATTESSA (the driveline system used in GTS4's and GTR's) is completely diffrent to a 4WD.

ATTESSA, in normal conditions sends all power to the rear wheels - just like a normal rear wheel drive car. When G sensors sence a certain amount of G's in any 3 dimentions (up-down, left-right, front-back) and also speed, steering angle and road speed vs RPM differences, a certain percentage of power from the rear wheels will be sent to the front wheels. This will continue till traction is re-gained and then power will be re-sent to the rears.

Diffrences in GTS/T vs GTS4/R include:

Gear box

Transfer box

Front diff

Front drive shaft

ATTESSA ECU

(all the things used to drive the front wheels)

As well as a "Front Wheel Percentage" gauge inside the cabin (in the gauge cluster for GTS4's and part of the 3 piece gauge cluster for GTR's)

Thats about it

[Hesh]

my r33 gts4 doesnt have this torque split gauge. though im lead tobeleive the r32 does.

Also here is something mull over.

ive often heard it said that a gts4 is rwd in perfect conditions..or normal driving. My attessa has been non functional for months due to failed g sensor, and the car was diffinately rwd. (abs and 4wd lights on perminantly on dash)

during this time the car was very light inthe steering department, tracked quite well round corners with minimal understeer and had the obvious power oversteer.

then i fixed the gsensor ..thus restorin the attessa to functioning. now if the "only as needed" were true then there should be no difference in feel or behaviour. however steering is heavier (remenisent of front drive cars) and even when not going hard, on a particularly polished local round about i got power understeer followed by over steer.

so i would guess (and as i have no torque gauge it's just that) the front wheels are driving albeit in a minimal capacity almost all of the time.

food for thought.

Edited November 15, 2008 by Hesh

[CeJay]

from memory the 33 and 34 attessa system is different to the 32, I think there is a small percentage always going to the front in the 33.

[GTS4WD]

Yip. In the 33's and 34's 5% of th torque is constantly being sent to the front wheels.

Also, the 33's and 34's track the G's speed, angle etc. at a quicker rate - every 100th of a second vs the 32 at every 10th of a second

[Hesh]

so putting a 32 g seionsor in a 33 ..any issues ?

[Eug]

one is hydraulic and one a electric system no??

[central coast person]

dont forget the bottom end of the engine has a few differences (such as a different shape to fit in the engine bay and obliviously a different sump) therefor a gts25\t cant be installed because the engines size is different and will have to engineer the engine mounts to fit it.

hesh your skyline does have the cluster because you stated that it read 4WD which should say 'slip' next to that one aswell , (meaning its the gts4 cluster) slip light will turn on when there is a loss of traction, 4WD light will turn on or flash only when there us a fault in the system and obviously you have one haha.

ECU is different too......

ummm you have 4WD diff's

suspension

all your steering components, ie pump, rack etc

brakes are apparently different but i looked at the computers at work the other day and all non turbo skylines fell under the same brake pad, even if there was ABS so i would like someone with a GTS4 to confirm this as the computers see no difference in the GTS4's brakes.

thats all that pops i to mind atm

thats all i can think of atm

[Hesh]

eug i think thats the hicas......erm han on ..no ..memory playing tricks..the did change the attessa to attessa ETS and ETS (pro??)

interestingly the gesnsors all have same part number except the modle code...and my car is rtunning fine ona 32 generation sensor ...

yes indeed i have the 4wd and slip lights. but no gauge to say how much torque goes to the front wheels ala the r32 gts4 and the r33 gtr. and although the slip light comes on when im booting it ..the car drives differently even at low speeds when no slip is being lit up....thus i am going to go withthe idea that a proportion of the power goes tothe front on a gts4 r33 all the time...after all 200 times a second is kinda fast to check grip levels isnt it lol....

with regard to brakes. i have ABS (uses same sensors as the 4wd on the wheels) fault on one system will knock out both ..(as mine did ..due to g sensor failing...both lights up on dash fault code 63 if anyone is looking.....flashes onthe ecu in the boot 6 then 3 ...repeated)

size of the r33 gts4 brakes are identical tothe gts25. i had both..the gts25s (rb25de auto 5 speed) and the gts4 saloon...brakes are identical dimentions calipers.

however the rb20e engined r33gts would appear to have smaller brakes....and also in some cases is listed as having different suspension ..though peoplehave fitted gts and gts t springs with no problems.

Edited November 16, 2008 by Hesh

[steve33]

i think the suspension is the same too because i sold me old coilovers to a guy with a gtst and he had no problems with them.

[GTS4WD]

Yeah, R32 GTS4's have different lower mounting cups on the rear suspension than GTST. BUt same as GTR

[MBS206]

i think the suspension is the same too because i sold me old coilovers to a guy with a gtst and he had no problems with them.

In the R33, the Suspension aftermarket wise, is the same.

Stock for stock, the rear end, is the same.

The front end though, the GTS4 runs a slightly stiffer front shock, to take the extra weight of the AWD system.

I WAS running GTS4 front springs in my GTS-t, made it less wanting to swing the tail out, and was slightly more understeery... Actually made it nice to drive.

Not sure on mounts in other R3* models though... Just know springs are defo interchangeable, and whole shocks 33 - 33...

[Hesh]

the front end would apear to be gtr derivative on the 33 whilst the rear subframe is the same as the rwd models. this holds true for the saloons as well. i have a whiteline rear antiroll bar on my saloon thats a coupe part.

[R34GTFOUR]

dont forget the bottom end of the engine has a few differences (such as a different shape to fit in the engine bay and obliviously a different sump) therefor a gts25\t cant be installed because the engines size is different and will have to engineer the engine mounts to fit it.

hesh your skyline does have the cluster because you stated that it read 4WD which should say 'slip' next to that one aswell , (meaning its the gts4 cluster) slip light will turn on when there is a loss of traction, 4WD light will turn on or flash only when there us a fault in the system and obviously you have one haha.

ECU is different too......

ummm you have 4WD diff's

suspension

all your steering components, ie pump, rack etc

brakes are apparently different but i looked at the computers at work the other day and all non turbo skylines fell under the same brake pad, even if there was ABS so i would like someone with a GTS4 to confirm this as the computers see no difference in the GTS4's brakes.

thats all that pops i to mind atm

thats all i can think of atm

The block isnt different to fit in the engine bay, there is only the slight difference on the bottom of the block where there are extra provisions for the front diff to bolt up. Other than that they are exactly the same.

Also the brakes are the same as the normaly na skylines for the r33 and r34's

Steering is also exactly the same in the r33-r34

[R34GTFOUR]

one is hydraulic and one a electric system no??

i think your mixing hicas and the awd together

hicas is hydraulic in the r32, electric in the r33 and my r34 doesnt have it all haha

the awd pump are all hydraulic in all series