Help Needed From R32 Gts4 Experts

[reNEGaDe88]

Hey guys.

I found a R32 GTS4 for sale with a RB25 from a stagea making ~350rwhp.

I have a few questions:

1. Does a GTS4 run the same gearbox and front axles etc as a GTR?

2. Where is the HICAS pump and reservoir, in the boot on the right side?

3. Is the rear diff the same in a GTS4 to a GTR? Ratio, strength, LSD?

4. Where is the ATTESA system ECU? Wiring and controlling components?

5. How does ATTESA system work, does it only send power to the front wheel when the rears start to slip? What is ETS?

6. How do you know if the system still works, like if fuse is blown or wiring is dodgy how can you tell? Does the gauge that says front torque split only read something if the system works?

7. Where is the high pressure pump that makes the front wheels engage power?

8. Is it common for 4th gear to crunch in GTS4 or GTR gearbox?

9. Is it worth putting in a GTR rear end in a RB25'd R32 GTS4, what are the advantages?

10. If ABS has been removed, does it change how the ATTESA system works?

11. Anything else you can tell me that could be useful.

Thank you all in advance.

[GTSBoy]

1. The gearbox is essentially the same. I don't know about the ratios, but they are swappable. I am pretty sure that the ATESSA system on the GTS4 is not as clever as the GTR's though.

2. HICAS is 4 wheel steering. As such, it is no different on a GTS4 than on any other R32. The reservoir is the power steering reservoir.

If, however, you mean ATTESSA reservoir, then yes, it's in the boot.

3. No. Diff is same as GTSt. that includes 5 bolt driveshafts and normal uni joint tailshaft, rather than GTR's CV type tailshaft and 6 bolt driveshafts.

4. Under the parcel shelf. Not the HICAS computer which is also there.

5. Google it.

6. Depends on how well the retrofit has been done, with respect to wiring and so on.

7. Not sure.

8. Shouldn't be.

9. Nup.

10. Dunno. Possibly.

[Dan_J]

1. The gearbox is essentially the same. I don't know about the ratios, but they are swappable. I am pretty sure that the ATESSA system on the GTS4 is not as clever as the GTR's though.

2. HICAS is 4 wheel steering. As such, it is no different on a GTS4 than on any other R32. The reservoir is the power steering reservoir.

If, however, you mean ATTESSA reservoir, then yes, it's in the boot.

3. No. Diff is same as GTSt. that includes 5 bolt driveshafts and normal uni joint tailshaft, rather than GTR's CV type tailshaft and 6 bolt driveshafts.

4. Under the parcel shelf. Not the HICAS computer which is also there.

5. Google it.

6. Depends on how well the retrofit has been done, with respect to wiring and so on.

7. Not sure.

8. Shouldn't be.

9. Nup.

10. Dunno. Possibly.

for the r32 gts4 the hubs(spline), half shafts, diff and tails shaft are all to suit/swap-able with a gtr

much like the gearbox i'd say the ratio is different tho

[GTSBoy]

Yeah?

[blind_elk]

1. Does a GTS4 run the same gearbox and front axles etc as a GTR?

Probably not as strong as a GT-R, but can't say for sure. After all, it's only designed to handle a RB20DET.

2. Where is the HICAS pump and reservoir, in the boot on the right side?

HICAS pump / reservoir is the same as the P/S pump /reservoir. R32 HICAS system is hydraulic, later models are electric.

The reservoir in the boot is the ATTESSA fluid reservoir.

3. Is the rear diff the same in a GTS4 to a GTR? Ratio, strength, LSD?

Both are R200 diffs. There the similarities end. GTS4 is a viscous LSD, 4.375 ratio. GT-R is a mechanical LSD, 4.111 ratio. (Stagea, as in mine, is 4.083, open?)

4. Where is the ATTESA system ECU? Wiring and controlling components?

In the boot, under the rear parcel shelf. Inputs come from:

ABS wheel sensors (wheel slip)

Throttle

G-sensors located under the centre console

5. How does ATTESA system work, does it only send power to the front wheel when the rears start to slip? What is ETS?

see 4. Also, search this site.

6. How do you know if the system still works, like if fuse is blown or wiring is dodgy how can you tell? Does the gauge that says front torque split only read something if the system works?

Warning light in the dash will come on in any sort of error condition.

7. Where is the high pressure pump that makes the front wheels engage power?

From memory, it hangs off the rear diff

8. Is it common for 4th gear to crunch in GTS4 or GTR gearbox?

Not normally, not in my case. Possibly a sign of a mistreated box.

9. Is it worth putting in a GTR rear end in a RB25'd R32 GTS4, what are the advantages?

I haven't done anything like that in mine, which was dynoed to 180kW at all four.

10. If ABS has been removed, does it change how the ATTESA system works?

Depends. If you leave the ABS sensors, then ATTESSA should still work.

[KiwiRS4T]

The advantage of putting a GTR rear end would be a proper mechanical LSD. It would be 4.1:1 (higher geared) so that could be a good or a bad thing... and the disadvantage would be that you would need to change the front diff to a 4.1:1 as well.

[reNEGaDe88]

Thanks heaps for the heads up guys. I used the F* out of google images and I now sorta get whats going on with Attesa (4th year engineering student btw)

A: Do GTR's have ATTESSA-ETS, the more advanced version?

B: Which ecu under parcel shelf is Attesa and which is Hicas?

C: Do the attesa systems mess up much?

D: If you have a 300+rwhp GTS4 and you pull the 4wd fuse, will it wheelspin in 2nd when coming onto boost? And have way more traction if attessa works?

Cheers again

[GTSBoy]

A. http://en.wikipedia.org/wiki/ATTESA-ETS

B. Looks like http://i106.photobucket.com/albums/m263/bades13/IMG_4194.jpg and http://i106.photobucket.com/albums/m263/bades13/IMG_4195.jpg

HICAS has two plugs like http://i106.photobucket.com/albums/m263/bades13/IMG_4196.jpg

Side by side..... http://i106.photobucket.com/albums/m263/bades13/IMG_4199.jpg

C. They have their failures. Poor maintenance is the main killer.

D. I'd be upset if you couldn't spin it up changing into 3rd, and like of course it will have more traction in AWD.

[Gts4RB30]

gts4 and gtr have the SAME gearbox as i have opened both side by side. your 4th gear is crunching cause your box has either been flogged or poorly maintained or both, as there are 3 small stainless clips in the synchro of 4th gear to allow it too work, albeit it a poor design and no nissan doesn't make them anymore, get a re coed box for like 800 somewhere or get and r33 gtr s2 box that can handle like 700hp. the awd system is hydraulic the front wheels will grip once the system realizes there is slip in the rear, you can hook up a kill switch to the fuse to alternate between 2wd and awd for some fun and it doesn't cause any issues, just make sure to stop before switching it over, also with these cars and other gtrs, wrx, evos, etc make sure that all 4 tyres share the same profile and rim size as having different sizes can and eventually will destroy your diffs. there is no need to change the diff out off a gts4 they are strong as and have seen 9 sec pass on many cars from japan, just look after it they are also known to handle 800hp plus with the right care and driving style. the cars are beautiful i will never sell mine i just spend 20k on the engine now is rb30. also your front suspension is GTST NOT GTR don't let people tell you it is because the strut end has a different fitting. also be careful replacing the ecu with another r32 ecu the gts4 has a fit if you put in a gtst not a gts4 one, f**ks me why. Honestly i would ditch the rb25 and get an rb26, if i where in your shoes and not have the money i did to throw at this thing. any other advise i can think of with these cars i will send your way when i can.

[RIPae86]

R32 gts4 coilovers are the same as r32 gtr

[reNEGaDe88]

Thanks for the replies guys. It really helped with my car.

I have a new question about GTS4's.

> Does the R32 GTR diff fit straight into a GTS4? Front and Rear, or are the housings difference size/shape/bolt pattern?

> Are the diff ratio's different?

> Are R32 GTR diffs the same ratio, like all only 4.1?

>If my rear diff in GTS4 has loads of backlash and I want to put in a better one, should I just get a 1.5 or 2 way LSD with correct diff ratio to match for rear. Rather than getting R32 GTR front and rear diffs as front diff install is engine out job.

Edited October 6, 2012 by reNEGaDe88

[KiwiRS4T]

I believe the front diff can be changed without pulling the engine but haven't done it myself.

I think the GTS4 had 4.3 diffs. All R32 and 33 GTR diffs are 4.1

[heller44]

Confirm that r32 gts4 is 4.375:1

[Gts4RB30]

Yes they are 100%. And My gts4 does not have GTR suspension i've tried 4 friggin sets and none match they are gtst? maybe i have an odd one.

[GTSBoy]

No-one ever (correctly) said that GTS4 have GTR suspension. What they do have is GTR front and GTSt rear.

[heller44]

Interesting as the old suspension I ripped out of my car was original r32 gtr all around.

[blind_elk]

No-one ever (correctly) said that GTS4 have GTR suspension. What they do have is GTR front and GTSt rear.

Other way round - rears are the same as GT-R. It appears that all models have the same style fronts.

I found if you ask for GT-R suspension components, you get the right stuff for the GTS4 (at least in R32s).

[GTSBoy]

GTR (or more to the point, AWD) fronts are shorter than GTSt, no?

Edited February 18, 2013 by GTSBoy

[reNEGaDe88]

>>>>>>>>>NEW QUESTION:

Will a R32 GTR front sway bar fit a R32 GTS4?
Found this thread: http://www.skylinesaustralia.com/forums/topic/283424-gtr-r32-front-sway-bars-suit-what-other-vehicles/

Though I unbolted the GTS4 one and put it next to a GTR one and the GTR one bends out 40mm on each side, so it doesnt look like it will fit.

Any ideas?

[GTSBoy]

Whiteline list the same front anti-roll bar for both R32 GTR and GTS4.