[OFFICIAL] Manual v. Automatic Thread

[JARblue]

Originally Posted by jwick

I didn't care for the SRM much but only played with it for the test drive. I do like the satisfaction of perfect shifting. Seems like SRM would take away some of that fun

SRM doesn't make a perfect shift feel any different. But what you think is perfect and what SRM or the ECU thinks is perfect might be two different things. I have used SRM over the years to hone the perfect shift according to what the car wants. That shift feels the same with or without SRM: beautiful

[ta-kid]

Originally Posted by JARblue

Doesn't every AT? My wife's Acura has paddle shifters. If you downshift, it rev matches.

Not familiar with other makes with paddle shifters so u may be right,but other late model automatics without paddle shifters,that I have driven, do not rev match.I was just saying that our Nissan auto does rev match for those using the excuse they bought a manual instead of the 7AT ,because of the rev match.And also our auto rev matches when using the console stick ,so you do not need paddle shifters necessarily to have auto rev match.Which brings me to ask of those who own a Z with a 7AT,but without the paddle shifters,do you get rev match feature when downshifting with the stick in manual mode.

[ItsErnie]

Originally Posted by ta-kid

Not familiar with other makes with paddle shifters so u may be right,but other late model automatics without paddle shifters,that I have driven, do not rev match.I was just saying that our Nissan auto does rev match for those using the excuse they bought a manual instead of the 7AT ,because of the rev match.And also our auto rev matches when using the console stick ,so you do not need paddle shifters necessarily to have auto rev match.Which brings me to ask of those who own a Z with a 7AT,but without the paddle shifters,do you get rev match feature when downshifting with the stick in manual mode.

It is the exact same rev match with the stick in manual mode as well as the paddles.

[FPenvy]

Originally Posted by ta-kid

Not familiar with other makes with paddle shifters so u may be right,but other late model automatics without paddle shifters,that I have driven, do not rev match.I was just saying that our Nissan auto does rev match for those using the excuse they bought a manual instead of the 7AT ,because of the rev match.And also our auto rev matches when using the console stick ,so you do not need paddle shifters necessarily to have auto rev match.Which brings me to ask of those who own a Z with a 7AT,but without the paddle shifters,do you get rev match feature when downshifting with the stick in manual mode.

rev match works on both paddles and console shifts.

the no paddles thing on the base 7at is new for the fucked new options nonsense Nissan went with sooooo I wouldn't know lol need a 2015 owner to chime in on that one.

[jpkirk]

So, I made the comment about buying manual because of the rev-match. I like manual. Doesn't make the manual better when considering acceleration performance. I just like the idea of rowing gears and nobody is going to change that ... for me. It's a personal choice. I have never been able to do the heel-toe thing because of an ankle injury back when I was a teenager. My foot doesn't bend well enough to make that throttle blip. So ... when rev-match came along, I found I could have my cake and eat it too.

[UNKNOWN_370]

Originally Posted by jpkirk

So, I made the comment about buying manual because of the rev-match. I like manual. Doesn't make the manual better when considering acceleration performance. I just like the idea of rowing gears and nobody is going to change that ... for me. It's a personal choice. I have never been able to do the heel-toe thing because of an ankle injury back when I was a teenager. My foot doesn't bend well enough to make that throttle blip. So ... when rev-match came along, I found I could have my cake and eat it too.

There's always a reason for tech in some arena. That's why I don't knock any of this tech. People have different situations and some tech accomodates people for reasoning thats bigger than our small logic.

[JARblue]

Originally Posted by ta-kid

other late model automatics without paddle shifters,that I have driven, do not rev match.

Are you saying that an AT without paddle shifters does not match engine and transmission speeds when downshifting? I don't believe that is true. All AT cars rev match or else they would just grind the transmission whenever they downshifted.

I don't know of any AT car with paddle shifters that does not rev match. In an AT car without paddle shifters you might still have a stick mode similar to the Z's manual mode - and the car will rev match whenever you use the stick to downshift. Or in an AT car without any sort of manual mode, you just mash down the gas pedal to downshift. The engine RPMs increase when the transmission makes the shift - aka rev matching.

[ta-kid]

Are you saying that an AT without paddle shifters does not match engine and transmission speeds when downshifting? I don't believe that is true. All AT cars rev match or else they would just grind the transmission whenever they downshifted.

Yes that's what I am saying.My 2015 Toyota Matrix with a 4 speed auto does not rev match.All rev match on a auto is ,the ecu brings the rpm up before the clutches or bands (or however the particular tranny engages)engages the next gear down.On a normal auto the clutch or bands engage the lower gear with some inherent slippage and as they firmly lock together the RPM climbs to what ever speed you are doing,not before hand like a rev match.All my Trans Ams with Turbo 400,s never rev matched.As a matter of fact, I actually destroyed a case on a Turbo 400 tranny downshifting into second before I had slowed down enough years ago.Hence my forum name TA-Kid,mind u I am not a kid anymore or own any Trans Ams anymore either.

[SouthArk370Z]

Originally Posted by ta-kid

Yes that's what I am saying.My 2015 Toyota Matrix with a 4 speed auto does not rev match. ... All my Trans Ams with Turbo 400,s never rev matched. ...

AT rev-matching is a feature of computer-controlled transmissions - not available back in the Good Old Days. I'm rather surprised that there are newer ATs (eg, your Toyota) without rev-match - once you have the algorithm, adapting to different transmissions should be almost no-cost to the manufacturer. Maybe it's the cost of the sensors on the stick.

[TexasChuck]

I'm sure glad mine works. I've hit the down shift paddle by mistake several times, while driving "spiritedly " !

[ta-kid]

Originally Posted by SouthArk370Z

AT rev-matching is a feature of computer-controlled transmissions - not available back in the Good Old Days. I'm rather surprised that there are newer ATs (eg, your Toyota) without rev-match - once you have the algorithm, adapting to different transmissions should be almost no-cost to the manufacturer. Maybe it's the cost of the sensors on the stick.

My Dodge Charger auto did not rev match either.Corvette has it now and a lot of imports do,but the domestic Auto,s are late to the party.

[Ramage]

Mine is a '15 base 7at with no paddles. It does rev match in mm and I love this car.

[Jordo!]

For those without the paddles:

I use it only 50/50 anymore.

Have the up-down for gear changes swapped (e.g., up to down shift), get an uprev tune to speed and firm them up, get a snazzy boot so it looks nicer and covers the now erroneous "+" "-" symbols, and have fun.

It feels like a sequential shifter/go kart, and is a ton of fun/very intuitive when driving (pull towards you to "grab a gear", "push away" to downshift when slowing down and braking into a corner).

It is great.

Details here AT Shifter Mod: Reverse the Up/Down Shift Directions

and for the cosmetics, here DIY OEM Shift Boot Install on Automatic

I ended up using double sided 3m tape to keep it all together, but works great and looks very nice

[vtec to vvel]

Originally Posted by JARblue

Are you saying that an AT without paddle shifters does not match engine and transmission speeds when downshifting? I don't believe that is true. All AT cars rev match or else they would just grind the transmission whenever they downshifted.

I don't know of any AT car with paddle shifters that does not rev match. In an AT car without paddle shifters you might still have a stick mode similar to the Z's manual mode - and the car will rev match whenever you use the stick to downshift. Or in an AT car without any sort of manual mode, you just mash down the gas pedal to downshift. The engine RPMs increase when the transmission makes the shift - aka rev matching.

not true. all auto's do not rev match. for example, my buddy's lexus is auto and if i move the shifter into a lower gear, yes the rpm will raise, but not in the rev-match way. it sounds like a manual downshifting where you put in a lower gear and slowly release the clutch where the rpms go up on its own and no gas pedal involvement for rev-matching whatsoever.

[JARblue]

Originally Posted by vtec to vvel

not true. all auto's do not rev match. for example, my buddy's lexus is auto and if i move the shifter into a lower gear, yes the rpm will raise, but not in the rev-match way. it sounds like a manual downshifting where you put in a lower gear and slowly release the clutch where the rpms go up on its own and no gas pedal involvement for rev-matching whatsoever.

So non-rev-matching AT transmissions just slow the speed of the engagement so as not to shock the drivetrain yet no revs to the engine are used to bring up the RPMS? Interesting. Sounds like someone driving a MT that doesn't know how