Fletch69z

iTrader: (50)

Either one is good, just depending on what you want to do with it. I prefer a manual just because I enjoy driving them and feel like I have a little more control with the man. trans. However, sometimes I wish I had an automatic just because the manual can get ridiculous in stop and go traffic.

JonsilvZ

I never said it was the same. But the GTR can be in full auto or manual without a 3rd pedal. Its foot to the floor shifts but quicker. I test drove a M3 smg which works the same as the GTR. Its very easy to drive like a auto,never misshift.

kirradude1025

Rwhp on the auto is about 227
Rwhp on the manual is about 235

SniperHunter

iTrader: (9)

No it isn't, for both cars. Drivetrain loss between both transmissions is statistical noise and negligible.

SuperBlack350z

iTrader: (59)

again, m3 and gtr uses a much more advance tranny and not the 350z.

I'm not bias anymore since i own an automatic Z roadster for my daily driver and though it's quick for an automatic it doesn't not shift fast at all period. SMG system is a much more better and advance system.

SniperHunter

iTrader: (9)

Imo, shifting in .200 of a second is damn fast. The SMGIII systems shift 0.80, and the Audi DSG does it in .030. Previous SMG systems shifted .150, iirc, as did Ferrari's systems. For what it is, the JATCO 5AT is a fantastic transmission all around. It gets a good amount of praise, especially from Edmunds who called it "one of the best transmissions we've ever driven."

Edit: For reference, it takes you .300 of a second to blink.

blazed54

iTrader: (1)

+1

mx48

I'm not sure why your saying "it doesn't shift fast"
If in tiptronic, ok, I'm with ya
In automatic mode my 07 shifts extremely fast, no hesitation at all.

SniperHunter

iTrader: (9)

It's supposed to be the opposite. Once the transmission adapts to your inputs, it shifts extremely quick. It takes about an hour or two of driving in manual mode to adapt.

bhendjol

oh, please...

mx48

Don't agree with that statement at all.
I drive all the time with the tip and doesnt come close to auto quickness.

SniperHunter

iTrader: (9)

Are you talking about downshifting? Or upshifting? In auto it'll hang on to a gear longer, and intentionally slip a little before each upshift, like most other ATs will. None of that happens in manual mode.

mx48

Talking upshifting, I clearly have a lag between gears(in tip), especially when in the upper rpms. downshifting the rev comes into effect. Auto mode, under heavy acceleration,computer shifts it efficiently.

SniperHunter

iTrader: (9)

That's extremely weird. I've never heard of such a thing. Most of the AT guys will say the opposite, in fact. Does your transmission make a pop into 2nd and 3rd gears in manual mode?

ComBat

iTrader: (1)

+1

SniperHunter

iTrader: (9)

I should record a video of my car shifting and see if your cars do the same.

mx48

Unless mine is different,bottom line is auto is quicker, Mine has a definate lag(in tip) between 1st and 2nd-3-4-5 not as pronounced. Not trying to make a statement to you, just telling you how mine reacts. I wonder if any other autos have different characteristics. To answer the pop question 2nd to 3rd yes, 4th- and 5th I describe as a smooth transition.

SniperHunter

iTrader: (9)

I'm not arguing with you. I just find it weird. In auto mode my shifting feels weird. It shifts the same in auto and manual when I'm flooring it to redline. But for everyday spirited driving it's just annoying.

And yes, I know 4th to 5th is smooth - 4th and 5th gears on this transmission engage differently than 1-3. There's a really great post on how the AT works, if I find it, I'll link you. Anyways, I was talking about shifting into 2nd, and into 3rd. That pop is a very good thing. My brother's M6 does it all the time when the transmission is set to the fastest setting. Satisfying sound.

3fittyBiH

iTrader: (1)

doesnt this Si only come in manual tho?? i think it does, im not 100% sure tho

gregom

iTrader: (3)

My 5AT is very smooth during shifting. I'm not sure what you guys mean by 'pop' but are you sure you just aren't hitting the rev limiter just as you shift? I've done this a few times and it jerks a bit when going into 2nd during hard acceleration.

Can a few of you guys with the 5AT with and without mods post some video of your full acceleration? I wish to compate against mine... For some reason my car feels slower, I think my 0-60 times are more in the high 6's. I can't think that would be caused by the extra weight in the Roadster, or maybe it is...