pickleseimer

M7s have two paddles.

ARM works on upshifts and downshifts on mine the few times I've tried it, however it can be 'fooled' if you are not selecting the next sequential gear, such as a 5-3 downshift / 3-5 upshift. Because of this I generally don't use it for street driving, but it is fantastic for downshifts while performance driving.

JerryU

Rev Match is the best thing since syncromesh, IMO! Used it all the time since I got my September 2013 built C7 Z51 and now on my Grand Sport.

Did not think it was working on upshifts either as it doesn't do anything different the way I shift. However validated it does IF shifting very slow. Normally when you shift you take your foot off the gas peddle and the engine reduces in rpm while you shift to the next highest gear. If you shift very slowly the rpm will decrease more than needed. With Rev Match it holds to the proper rpm for about 1 1/2 to 2 seconds. Never shift that slow so don't perceive it doing anything!

I have been driving standard shifts in every DD for 55+ years. Quite good at heel-toe (or toe-side of foot in cars with good peddle position, like Vettes.) However at lower rpm's, much harder to modulate the throttle to get a perfect match. These are places I find it most useful.

When cruising in town in 5th at 45 mph that is only ~1400 rpm. When making a turn want to be in 3rd, which is only 2500 rpm at 40 mph. Just shift directly to 3rd and Rev Match makes it a perfectly smooth transition, every time.

Same when leaving an Interstate on the exit ramp. Driving in 7th at 70 mph is only ~1500 rpm. No need to go through two other overdrives, 6th and 5th to get to where it would be best when off the Intestate, direct drive 4th. That is only 2600 rpm at 60 mph. So back off the throttle, let it cost and Rev Match makes a perfectly smooth transition. I also use 4th when accelerating past 18 wheels to minimize exposure time to thrown rocks! The shifter springs help, just pull back on the shifter with no side force and you're in 4th. When past, shift back directly to 7th! The C7 is the first car I have owned where even though the clutch was depressed, when you shift back to 7th no need to hit cruise control Resume button, it resumes automatically!

JerryU

I skip gears all the time when downshifting! 7th to 4th and for most of my driving 5th to 3rd.

There are two things I had to learn however:

1) Can't do what I did in my C6 and other cars when skipping a gear in a downshift. CAN'T put the car in the next lower gear even while keeping the clutch depressed-fools the computer! I have always done that as it spools up a cluster gear making less work for the syncros. However the Tremic M7 has triple syncros in most gears. One is carbon faced. Let them worry about spooling up the gears! Took me a while to break that habit.

2) Some folks complain about it over revving. Mine never does BUT did a test and duplicated a large over rev. While driving in 5th, moved the lever as if for my favorite 5th to 3rd downshift shift. However I was purposely not careful with the shift lever when in neutral. I moved it slightly to the 1st 2nd gate WHILE ONLY IN THE NEUTRAL GATE. Never moved it into either gear. The engine revved as if I was planning to shift to 2nd. The Hall sensors don't wait for you to shift into a gear, they anticipate what they think you want to do!

So be very careful where you put the shift lever, even when in the neutral gate!


Funny, I use it all the time when driving, except occasionally when performance driving, I shut it off to keep my toe-side of foot skills honed! Much easier to stab the throttle when you're down shifting one gear and will be at a high rpm in the lower gear!

village idiot

Strangely, they disabled it below 16mph on the 17 and up. 16 and below works just fine.

And it's damn annoying that they disabled it.

JerryU

I was surprised when my 2LT Grand Sport came with red paddles that were the same as my red interior!

Skid Row Joe

See Posts #9 & #15......

defaria

Of all the things I've lost it's my mind I missed the most!

Skid Row Joe

They look like; "In case of Fire," pull handles!

gtleo106

JerryU, the manual says you shouldn't skip more than one gear when downshifting. Is that a concern?

village idiot

I wonder this too. As some tracks I'm going from 5 to 2. Car doesn't seem to mind any. ARM is so awesome in situations like that.

Supersonic 427

On my '18 Z06 1LZ 7M, the rev match paddles are red along with the red stitching. Both the red paddles and red stiching are standard on red interior Z06's regardless of trim level.

Grand Slam

^Not in many cases. The gears are so close that it often doesn't cause an over-rev.

mittens

so the colored paddels are optional? or aftermarket?

Foosh

No problem w/ that unless you are close to the redline in 4th/5th when you try to go to 2.

village idiot

I just brake and at turn in I'll drop it to 2nd.

TXshaggy

gtleo106

1–4 Shift Message
When the DIC displays this
message, the vehicle can only be
shifted from 1 (First) to 4 (Fourth).
See Transmission Messages 0 131.
Downshifting
Do not downshift into the gear at a
speed greater than shown:
1 (First) 72 km/h (45 mph)
2 (Second) 107 km/h (67 mph)
3 (Third) 160 km/h
(100 mph)
4 (Fourth) 233 km/h
(145 mph)
Caution
When downshifting, if more than
one gear is skipped, or the engine
is racing when the clutch pedal is
released, the engine, clutch,
driveshaft or transmission could
be damaged.

Foosh

Right, it doesn't mean you can't skip a gear when down shifting, it just means you better not be at a speed that won't support the lower gear you're shifting to per the speed guidelines above.

If you exceed those limits, you risk running the engine well above redline and suffering a catastophic engine failure. There is a thread running here right now with ugly pictures of a completely destroyed engine caused by exactly that.

LT4_CE

By 'when the accelerator pedal is applied' I don't think they mean only when the clutch is not engaged. I took that to mean, literally, when you're on the throttle at any time during the process of shifting. So if you're on the throttle while shifting, ARM will disengage for that shift only. It's still engaged overall... I think of it as being still engaged on a system level, just temporarily disengaged for that particular shift.


I think it still works with upshifting... could be wrong though. I think with upshifting, since the motor is already at a higher rev level (closer to where it needs to be for the gear you're shifting into) the ARM adjustment may be so small that it's not particularly noticeable. With downshifting, there is a greater disparity between where your revs are at, and where they need to be for the downshift, so it's more noticeable.



I've had a real hard time getting used to taking my foot off the throttle while shifting. I've had the Vette over a year now (still only about 3100 miles though) and if I don't pay attention to it, I forget, and blip the throttle. It doesn't happen too often, but often enough to be irritated with myself...

Speaking of irritating, the 1-4 skip shift took me into fourth the other day for the first time... man, I was really disappointed in myself when that happened!

mittens

it works for upshifting too, take you time on a shift and instead of the car going to idle, and you letting the clutch out and bringing the RPMs back up to that next gear..

it will only let the rpms drop to the next gears match spot... if you wait for longer then 3-4 seconds it will then give up and let the car drop to idle.