Question about synchro rev match sensitivity

NismoNY · 02-07-2015, 08:16 PM

Hello everyone,

I had my 2014 370 Nismo for a few months and there was something up with the synchro rev match system that's been bugging me. I love it for downshifts but it's questionable with upshifts. Does anyone notice that certain upshifts come with an additional rev in the throttle? Sometimes if I'm fast shifting 4th into 5th it'll rev extra, kind of like the system thinks it's going to be downshifting into 3rd. Sometimes it happens sometimes it doesn't.

It just seems like sometimes even when I'm consciously making a neat shift into 5th, 3rd will be activated and it'll rev up. Does this happen to anyone else? I don't notice it on the 2-3 shift even if I "try" to trigger the gate for 1st. So is 3rd gear just overly sensitive in this car with synchro rev on? Or could it just be driver error even though I "think" I'm shifting properly. Or could there be a problem with the car? There is no malfunction light for the synchro rev match system. I'm no amateur to manual driving - oh yea, it's fine with SRM off and I've kind of been enjoying heel and toeing myself.

Duc_Z09 · 02-07-2015, 08:21 PM

Happens to me sometimes too, but usually only if I leave it between gears for an extra second or don't get a clean transition into the next slot. It's also saved my bacon once or twice when I fu^ked up and almost went into the wrong gear. Neat feature overall IMO.

SouthArk370Z · 02-07-2015, 08:24 PM

If pushing the stick "straight" from 4th to 5th (ride against the side of the gate) doesn't work, it may need some adjustment. Download the FSM. It describes how the system is supposed to work, has diagnostic procedures, diagrams, adjustments, &c.

kenchan · 02-07-2015, 08:33 PM

problem with having 3 MT cars the gate entry angles are all different so once in a blue moon i mess up the gate entry and wake myself up.

NismoNY · 02-08-2015, 06:54 AM

Interesting

So I take it that its "normal" then. I guess it couldn't hurt to check the adjustment of the shifter as well but the car has low miles and I doubt it's already out of whack.

The way I found this out was I was having some fun on the highway and quick shifted into 5th at around 4.5k and it revved up a good bit. I thought it was odd so I've been conscious about it ever since. But it doesn't really happen under normal rpm for everyday driving, like 3 rpm

Zoren 370 · 02-08-2015, 07:06 AM

This guy have the same issue in this thread and its another 2014 Nismo.

2014 Nismo with possible Synchro Ref issues in 5th gear

roplusbee · 02-08-2015, 07:08 AM

Did you install an aftermarket stereo? If so, check to make sure that everything is connected properly and nothing is chopped-up. If not, scan for codes or just take it in to the dealer and show them what it is doing.

NismoNY · 02-08-2015, 09:52 AM

Hey guys, no aftermarket stereo, though I am looking at a Pioneer.

On my way to gym today it didn't happen once and I was really neat with the shifts above 4k. I guess its just characteristic of the car. Appreciate the replies.

kenchan · 02-08-2015, 01:16 PM

yah, clean gate entry is all that it's needed.

GL on the pioneer HU. i luv mine.

NismoNY · 02-08-2015, 09:41 PM

Yea I think that's all that's needed...clear gate entry, though I do think some cars might more sensitive than others

scope22 · 02-09-2015, 08:15 AM

i spoke with dealer about this and they said that its normal, sync rev match is for up and down shifts

NismoNY · 02-09-2015, 08:22 AM

Quote:

Originally Posted by scope22

i spoke with dealer about this and they said that its normal, sync rev match is for up and down shifts

Oh, I knew that - this isn't about that though.

I was talking about why 3rd gear seems to more sensitive in regards to synchro rev match when upshifting from 4th to 5th. Seems sometimes even when I think I'm doing a clean shift, it'll rev up as if it was detecting 3rd gear. But, for now, I'm going to chalk it up to driver error b/c it hasn't happened the past few days and I've been making very conscious shifts from 4th - 5th. I will say though that I've never given something this much though compared to my previous manual cars, but then again, those didn't have SRM and this might just be how SRM is... very sensitive.

tturbo370z · 02-09-2015, 11:52 AM

Quote:

Originally Posted by NismoNY

Oh, I knew that - this isn't about that though.

I was talking about why 3rd gear seems to more sensitive in regards to synchro rev match when upshifting from 4th to 5th. Seems sometimes even when I think I'm doing a clean shift, it'll rev up as if it was detecting 3rd gear. But, for now, I'm going to chalk it up to driver error b/c it hasn't happened the past few days and I've been making very conscious shifts from 4th - 5th. I will say though that I've never given something this much though compared to my previous manual cars, but then again, those didn't have SRM and this might just be how SRM is... very sensitive.

Mine does that on occasion from 4th to 5th and pegs the **** out of the redline cuz rev synch "thinks" I wanna go down to 3rd. Doesn't happens often but as kenchen posted it really wakes u up.

Magic Bus · 02-09-2015, 02:49 PM

Happens to me occasionally on my 3rd to 4th shifts. Usually happens when I lazily shift below 3k.

FPenvy · 02-09-2015, 02:53 PM

my 7AT gets the rev blip sometimes when going 4th to 5th. typically only when going full throttle it'll do it.

02-07-2015, 08:16 PM	#1 (permalink)
NismoNY Base Member Join Date: Feb 2015 Location: NYC Posts: 112 Drives: 2014 Nismo Rep Power: 11	Question about synchro rev match sensitivity Hello everyone, I had my 2014 370 Nismo for a few months and there was something up with the synchro rev match system that's been bugging me. I love it for downshifts but it's questionable with upshifts. Does anyone notice that certain upshifts come with an additional rev in the throttle? Sometimes if I'm fast shifting 4th into 5th it'll rev extra, kind of like the system thinks it's going to be downshifting into 3rd. Sometimes it happens sometimes it doesn't. It just seems like sometimes even when I'm consciously making a neat shift into 5th, 3rd will be activated and it'll rev up. Does this happen to anyone else? I don't notice it on the 2-3 shift even if I "try" to trigger the gate for 1st. So is 3rd gear just overly sensitive in this car with synchro rev on? Or could it just be driver error even though I "think" I'm shifting properly. Or could there be a problem with the car? There is no malfunction light for the synchro rev match system. I'm no amateur to manual driving - oh yea, it's fine with SRM off and I've kind of been enjoying heel and toeing myself.

02-07-2015, 08:21 PM	#2 (permalink)
Duc_Z09 Track Member Join Date: Jan 2014 Location: Frederick MD Posts: 876 Drives: With the blinker on. Rep Power: 24	Happens to me sometimes too, but usually only if I leave it between gears for an extra second or don't get a clean transition into the next slot. It's also saved my bacon once or twice when I fu^ked up and almost went into the wrong gear. Neat feature overall IMO. __________________ 2009 370z #206 (all mods are Home Depot) 2009 Ducati 848 (full Ohlins, Termignoni, etc) 2003 Grand Cherokee (long arms, big tires, 4.56, lockers)

02-07-2015, 08:24 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	If pushing the stick "straight" from 4th to 5th (ride against the side of the gate) doesn't work, it may need some adjustment. Download the FSM. It describes how the system is supposed to work, has diagnostic procedures, diagrams, adjustments, &c. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

02-07-2015, 08:33 PM	#4 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	problem with having 3 MT cars the gate entry angles are all different so once in a blue moon i mess up the gate entry and wake myself up. onzedge, jpkirk and Haboob like this.

02-08-2015, 06:54 AM	#5 (permalink)
NismoNY Base Member Join Date: Feb 2015 Location: NYC Posts: 112 Drives: 2014 Nismo Rep Power: 11	Interesting So I take it that its "normal" then. I guess it couldn't hurt to check the adjustment of the shifter as well but the car has low miles and I doubt it's already out of whack. The way I found this out was I was having some fun on the highway and quick shifted into 5th at around 4.5k and it revved up a good bit. I thought it was odd so I've been conscious about it ever since. But it doesn't really happen under normal rpm for everyday driving, like 3 rpm Last edited by NismoNY; 02-08-2015 at 06:59 AM.

02-08-2015, 07:06 AM	#6 (permalink)
Zoren 370 A True Z Fanatic Join Date: Mar 2012 Location: FL Posts: 11,018 Drives: 11 Nissan 370 M6 Rep Power: 1913654	This guy have the same issue in this thread and its another 2014 Nismo. 2014 Nismo with possible Synchro Ref issues in 5th gear NismoNY likes this.

02-08-2015, 07:08 AM	#7 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 23	Did you install an aftermarket stereo? If so, check to make sure that everything is connected properly and nothing is chopped-up. If not, scan for codes or just take it in to the dealer and show them what it is doing. __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

02-08-2015, 09:52 AM	#8 (permalink)
NismoNY Base Member Join Date: Feb 2015 Location: NYC Posts: 112 Drives: 2014 Nismo Rep Power: 11	Hey guys, no aftermarket stereo, though I am looking at a Pioneer. On my way to gym today it didn't happen once and I was really neat with the shifts above 4k. I guess its just characteristic of the car. Appreciate the replies.

02-08-2015, 01:16 PM	#9 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yah, clean gate entry is all that it's needed. GL on the pioneer HU. i luv mine. UNKNOWN_370 and NismoNY like this.

02-08-2015, 09:41 PM	#10 (permalink)
NismoNY Base Member Join Date: Feb 2015 Location: NYC Posts: 112 Drives: 2014 Nismo Rep Power: 11	Yea I think that's all that's needed...clear gate entry, though I do think some cars might more sensitive than others

02-09-2015, 08:15 AM	#11 (permalink)
scope22 A True Z Fanatic Join Date: Apr 2012 Location: Roswell, GA Posts: 1,179 Drives: wife crazy Rep Power: 56	i spoke with dealer about this and they said that its normal, sync rev match is for up and down shifts

02-09-2015, 02:49 PM	#14 (permalink)
Magic Bus A True Z Fanatic Join Date: May 2012 Location: Honolulu Posts: 1,427 Drives: 17 6MT M2 Rep Power: 18755	Happens to me occasionally on my 3rd to 4th shifts. Usually happens when I lazily shift below 3k.

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