Nissan 370Z Forum

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-   -   No synchro Rev Match on A7? (http://www.the370z.com/nissan-370z-general-discussions/4855-no-synchro-rev-match-a7.html)

leepeen 05-25-2009 12:59 AM

No synchro Rev Match on A7?
 
I bought A7 white pearl 370z with every package loaded(sports,Navigation) and i wasn't really feel suspicious about the fake button(there is no S mode printing on the button and i can't press it because, it's fake.) on the rightside of the gear.:confused: However, one of my friend told me that even if my Z is A7, sports package loaded Z " must " have the " S " button, which is not a fake.
I've agreed to my friend because, when i change the gear to paddle shifting mode, and if i down shift, my Z seems not matching the RPM, and the engine is screaming like there is no tomorrow. Plz help me!!!

leepeen 05-25-2009 01:04 AM

My z got 19" inch forged wheel with bridgestone Potenza tires, which mean's that my Z has sports package, no doubt on it.

frost 05-25-2009 01:06 AM

Whoa, uhm. If I'm deciphering this correctly, there is rev match when you use the paddle shifters, but not in full automatic mode. But you have to downshift while slowing/stopping obviously for the rev match to work.

AK370Z 05-25-2009 01:35 AM

ONLY 6 speed 370Zs equipped with sports package gets the S mode button. On automatics, you have to move your shift lever to M mode (next to drive) and then you can use the paddle shifters. It WILL rev match for you just like 6MT. Take my word for it.

http://i576.photobucket.com/albums/s...70Z_com/a7.jpg

leepeen 05-25-2009 01:47 AM

Thank you Frost, Ak370z. :-)

shumby 05-25-2009 03:22 AM

AK is 100% correct. that is exactly how it works on my 7AT G37

mspeasl 05-25-2009 08:05 AM

Seeing is Believing
 
Quote:

Originally Posted by shumby (Post 77839)
AK is 100% correct. that is exactly how it works on my 7AT G37

I will have to see it to believe it..................... The AT that I test drove before I purchased my 6sp did nothing more than increase RPM when I downshifted using the paddles. It was no different than a normal AT in any other car when you pulled the lever into a lower gear????????
:koolaidwall:

shumby 05-25-2009 08:12 AM

how were you driving. under normal conditions you hardly notice it. BUt during spirited driving and fast decell is when you see it feel it and hear it. So no0w you need to find a friend with a 7AT and find out foryourself instead of just saying no.

FlashBazbo 05-25-2009 08:14 AM

Yep. It rev matches. The revs (and tach needle) come up just before the lower gear hits. And the lower gear doesn't hit with the same idiot jolt that a non-matching setup provides.

No doubt it saves a lot of strain on the transmission but, functionally, it's not a lot different than an automatic without rev matching.

Chan Chee Hoe 05-25-2009 10:05 AM

I tried to downshift for engine braking down a deep slope,it cause the engine to revs higher thus reduced the engine braking....for the first 2 secs the car would go faster instead of slowing down,really give me a shock.

2bits 05-25-2009 01:52 PM

Quote:

Originally Posted by mspeasl (Post 77868)
I will have to see it to believe it..................... The AT that I test drove before I purchased my 6sp did nothing more than increase RPM when I downshifted using the paddles. It was no different than a normal AT in any other car when you pulled the lever into a lower gear????????
:koolaidwall:

If you weren't aggressive during that test drive (i.e. staying at low RPMs), it wouldn't be that obvious. If you used Drive instead of Manual, you couldn't notice it because it's turned off. BTW, check out Nissan's site:

2009 Nissan 370Z Coupe Specs - Nissan USA

It's called "Downshift Rev Matching" instead of SRM, but the effect is the same. All 7AT's have it, whereas only Sport 6MT's have SRM.

mspeasl 05-25-2009 10:24 PM

SRM and DRM
 
Quote:

Originally Posted by 2bits (Post 78009)
If you weren't aggressive during that test drive (i.e. staying at low RPMs), it wouldn't be that obvious. If you used Drive instead of Manual, you couldn't notice it because it's turned off. BTW, check out Nissan's site:

2009 Nissan 370Z Coupe Specs - Nissan USA

It's called "Downshift Rev Matching" instead of SRM, but the effect is the same. All 7AT's have it, whereas only Sport 6MT's have SRM.

The below is from another question on the forum and it says about the same as I did when I made the comment about how it feels about the same as other A/T's when downshifted.

Quote:

Originally Posted by ChrisSlicks (Post 78336)
(Noob question) SRM stands for?

SRM is short for Syncro Rev Match.
In principle SRM and DRM from the auto trans work the same. The big difference is that it is much easier to do in an auto transmission because the computer is in control of the transmission, it knows what gear it is heading to and what the target RPM is. With a manual transmission it doesn't know what gear it is going to until you select it. The SRM system is a first, DRM on the other hand is pretty standard in modern transmissions.

:argue:

Lug 05-26-2009 09:53 AM

DRM is SRM. SRM is new, DRM has been used for years. It feels the same as other AT's because it is the same. The manual is just catching up to what AT's have done for years.

2bits 05-28-2009 02:00 AM

Quote:

Originally Posted by mspeasl (Post 78456)
The below is from another question on the forum and it says about the same as I did when I made the comment about how it feels about the same as other A/T's when downshifted.


:argue:

So which is it? Do you believe the 7AT lacks DRM which we have already established works exactly like SRM ("I will have to see it to believe it..................... "), or do you now think ALL modern autos have DRM? We're telling you how the 7AT works as owners of said tranny, and you missed the rev matching during your test drive.

jakoye 05-28-2009 07:31 AM

Quote:

Originally Posted by AK370Z (Post 77822)
ONLY 6 speed 370Zs equipped with sports package gets the S mode button. On automatics, you have to move your shift lever to M mode (next to drive) and then you can use the paddle shifters. It WILL rev match for you just like 6MT. Take my word for it.

http://i576.photobucket.com/albums/s...70Z_com/a7.jpg

Regarding your picture of the AT shifter, can you shift gears through the stick itself or are you restricted to using the steering wheel paddles when in Manual mode?

wstar 05-28-2009 07:42 AM

Yes, the 7AT always matches revs correctly, whether it's shifting on its own (D-mode), or you are shifting (M-mode).

And yes, you can use the shift knob instead of the paddle shifters if you want. It works the same as most AT's with a manual mode (sequential-like, with a forward click being upshift and a rearward click being downshift). It's probably better and easier to always use the paddles if you can get yourself used to it. I have 6MT habits so I'm constantly putting my hand down there and using the stick instead, then catching myself doing it and switching back to the paddles. It will take a while :)

If you think the 7AT is speeding you up when you downshifted intending to decel, it's not the 7AT, it's you. Check out what you're doing with the throttle. You can downshift for accel or downshift for decel, and the difference is your throttle input at the time.

wellarmed 05-28-2009 08:24 AM

I really can't help it..... LOL. People here who actually own these with the auto have to argue how they work with somebody who took a test drive once.:confused:
Agressive downshifting with the paddles, uses the rev matching feature just like the manual. No other auto trans I've ever experienced has even done anything close. If you don't "believe" it then by all means go take another test drive and get the sales guy to help you.
Also.... when down shifting, the car won't "speed up" if you take your foot off the gas like you're sposed to do when you're.... down shifting.

mspeasl 05-29-2009 11:09 AM

Sorry I said anything
 
Quote:

Originally Posted by wellarmed (Post 79931)
I really can't help it..... LOL. People here who actually own these with the auto have to argue how they work with somebody who took a test drive once.:confused:

Sorry I said anything. One of these days I'll learn to keep my mouth shut.
:stirthepot:


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