Rapid Down Shift... It does work... - Page 2 - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Eric GTR · 3rd September 2008, 11:10 AM

Quote:

Originally Posted by tokyogtr

don't worry, by the time you guys over there get the basic GT-R we in Japan will have moved on to the spec-v II with ceramic brakes etc etc...

I honestly dont want a spec V

Im going to be driving mine on the road, i want as much comfort and toys as i can get and not to go death at 100mph ...

Robbie J · 3rd September 2008, 07:33 PM

I tried but I could not get it down shift 2 in one go, in race its really quick but goes thro both gears, I was playing with a porker as well.

I will try harder tomorrow

R

RA7290 · 3rd September 2008, 09:01 PM

Guys, if I am not completely wrong, the nature of a direct shift gearbox is that it comes with one double-clutch and actually two sets of gearboxes, one for 1-3-5, the other for 2-4-6.

As the clutch is either connected to the even or uneven gears, you can't shift let's say from 5 to 3 directly, as you have to go through 4.
So it's only thanks to very short shifting times in R-mode that it almost feels like shifting down 2 in 1...

sorry, only in German - but we invented it ;-)

Anyway, this is still theoretic stuff - I can't wait to try it myself in a couple of weeks on the Nordschleife :-)

Cheers & good night, Jan

Robbie J · 4th September 2008, 09:42 PM

I tried really hard today,

set it to D and I think I saw it go thro the gears on the MDF but looks like it went down two on the dash...

Now tomorrows commute I will try not to kill anybody

R

tokyogtr · 4th September 2008, 10:10 PM

interesting, mine definitely looks and feels like it jumps down 2 gears. maybe it's doing it so quickly i cannot detect it but it's definitely working. robbie, is your car run in and had it's first service? the gearbox opens up a bit after a few thousand Ks... that might explain why mine can do it but yours does not.

Robbie J · 4th September 2008, 11:05 PM

more likely I'm not pushing it enough

serviced on 4K miles now

R

Robbie J · 4th September 2008, 11:06 PM

tokyoGTR

Try it with the gearbox display on D

R

tokyogtr · 5th September 2008, 12:28 AM

Quote:

Originally Posted by Robbie J

tokyoGTR

Try it with the gearbox display on D

R

i'll crash if I watch that at the speed i'm driving... But fair point. Still, it's lightning fast for me when i do it regardless of it having to go thru 1 extra gear.

mindlessoath · 5th September 2008, 01:28 AM

You can have the dealer with a gtr certified tech re-program the Transmission for you.
first things first, the car has to be cool to tune it. no more than 87C so try cooling it down to about 50C

the delay is all adjustable. just making very small adjustments to the settings will help a great deal.

The gtr tech will drive with you and he can make the small adjustments using consult iii, they are very miniscule adjustments.

also change the tranny fluid often! especialy after a race.

mindlessoath · 27th September 2008, 04:45 AM

spam?

in any case the R35 trans shifts faster with more throttle response. so make it think its putting the trottle at wot all the time and you have an imporvement.

4th September 2008, 10:10 PM	#20 (permalink)
tokyogtr GTROC Member Join Date: Feb 2008 Location: Tokyo Posts: 1,086	interesting, mine definitely looks and feels like it jumps down 2 gears. maybe it's doing it so quickly i cannot detect it but it's definitely working. robbie, is your car run in and had it's first service? the gearbox opens up a bit after a few thousand Ks... that might explain why mine can do it but yours does not. __________________ My GTR SUCKS..... air.... then big shiny turbos force it into the engine.

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3rd September 2008, 07:33 PM	#17 (permalink)
Robbie J GTROC Member Join Date: Jan 2005 Location: london Posts: 969	I tried but I could not get it down shift 2 in one go, in race its really quick but goes thro both gears, I was playing with a porker as well. I will try harder tomorrow R

3rd September 2008, 09:01 PM	#18 (permalink)
RA7290 GTR Register Member Join Date: Aug 2008 Location: Munich / Germany Posts: 9	Guys, if I am not completely wrong, the nature of a direct shift gearbox is that it comes with one double-clutch and actually two sets of gearboxes, one for 1-3-5, the other for 2-4-6. As the clutch is either connected to the even or uneven gears, you can't shift let's say from 5 to 3 directly, as you have to go through 4. So it's only thanks to very short shifting times in R-mode that it almost feels like shifting down 2 in 1... sorry, only in German - but we invented it ;-) Anyway, this is still theoretic stuff - I can't wait to try it myself in a couple of weeks on the Nordschleife :-) Cheers & good night, Jan

4th September 2008, 09:42 PM	#19 (permalink)
Robbie J GTROC Member Join Date: Jan 2005 Location: london Posts: 969	I tried really hard today, set it to D and I think I saw it go thro the gears on the MDF but looks like it went down two on the dash... Now tomorrows commute I will try not to kill anybody R

4th September 2008, 11:05 PM	#21 (permalink)
Robbie J GTROC Member Join Date: Jan 2005 Location: london Posts: 969	more likely I'm not pushing it enough serviced on 4K miles now R

4th September 2008, 11:06 PM	#22 (permalink)
Robbie J GTROC Member Join Date: Jan 2005 Location: london Posts: 969	tokyoGTR Try it with the gearbox display on D R

5th September 2008, 01:28 AM	#24 (permalink)
mindlessoath GTR Register Member Join Date: Nov 2007 Location: usa Posts: 555	You can have the dealer with a gtr certified tech re-program the Transmission for you. first things first, the car has to be cool to tune it. no more than 87C so try cooling it down to about 50C the delay is all adjustable. just making very small adjustments to the settings will help a great deal. The gtr tech will drive with you and he can make the small adjustments using consult iii, they are very miniscule adjustments. also change the tranny fluid often! especialy after a race.

27th September 2008, 04:45 AM	#25 (permalink)
mindlessoath GTR Register Member Join Date: Nov 2007 Location: usa Posts: 555	spam? in any case the R35 trans shifts faster with more throttle response. so make it think its putting the trottle at wot all the time and you have an imporvement.