A6 shifting way before redline - even in PTM5? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

roSSco · 07-09-2013, 07:58 AM

I recently went to the dragstrip in my ZL1 and it was quite disappointing. My best time was 12.61 with a 1.8 60' Two other runs were 12.8x MPH was 111.

I had a dash cam running for 2 of the runs and it sure sounds like it was shifting way early on the 1-2 and 2-3 shifts.

I admit I wasn't watching the tach, but I was in PTM5 and Sport mode for sure.

I have worn out Google and the search function here, but was wondering if anyone was aware of this issue.

I have not made any follow up runs yet to watch the tach during a repeat, but am pretty sure this is the case.

Watch one of the videos and let me know what you think. (right click on links, save)

http://www.anotherls1.com/ZL1/1373080689921.3gp

http://www.anotherls1.com/ZL1/1373081842122.3gp

2012-1822 · 07-09-2013, 10:16 AM

I thought you Autos didn't have PTM.

1MtnGoat · 07-09-2013, 10:23 AM

Quote:

Originally Posted by 2012-1822

I thought you Autos didn't have PTM.

It's the convertibles that don't. Autos do.

DangerZL1 · 07-09-2013, 10:51 AM

Hard to tell from watching your video. I'd do a run in your favorite testing area and see where it shifts. I believe there have been some posts saying the auto shifts before redline, but redline may not be the optimal shift point for the auto.

CAM....ZL1 · 07-09-2013, 11:32 AM

I can certainly tell you that at WOT the auto will and does shift at 5900 rpms.

Scott@Bjorn3D · 07-09-2013, 11:35 AM

You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

Sven59 · 07-09-2013, 11:35 AM

In mode 5 the car still controlls some functions, try with all nannies off and see if it does it.

CAM....ZL1 · 07-09-2013, 12:00 PM

Quote:

Originally Posted by Scott@Bjorn3D

You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

This is also correct info. same thing a good tuner will tell you. about 500 is a good measurement.

roSSco · 07-09-2013, 01:11 PM

I saw an article that said the transmission shifts at 5800 in Drive and 6000 in Sport mode.

Found the article.
http://www.gmhightechperformance.com...1/viewall.html

Sven59 · 07-09-2013, 01:30 PM

Quote:

Originally Posted by roSSco

I saw an article that said the transmission shifts at 5800 in Drive and 6000 in Sport mode.

Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

Interesting, does anyone know if you turn the nannies off this still applies?

JDP Sales · 07-09-2013, 01:54 PM

Quote:

Originally Posted by Scott@Bjorn3D

You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

This is true. The Tachometer will lag slightly behind.

Best regards,

Tyler
888-308-6007

roSSco · 07-11-2013, 07:57 AM

I did the DA calculations and discovered it was around 3000' which translates into a 12.14 @ 114.9. Not too far off the mark for a stock ZL1.

What a relief!

07-09-2013, 07:58 AM	#1
roSSco ∞ Smiles per mile Drives: 2013 ZL1 Summit White A6 Join Date: Jun 2009 Location: Arlington, TN Posts: 101 View My Garage	A6 shifting way before redline - even in PTM5? I recently went to the dragstrip in my ZL1 and it was quite disappointing. My best time was 12.61 with a 1.8 60' Two other runs were 12.8x MPH was 111. I had a dash cam running for 2 of the runs and it sure sounds like it was shifting way early on the 1-2 and 2-3 shifts. I admit I wasn't watching the tach, but I was in PTM5 and Sport mode for sure. I have worn out Google and the search function here, but was wondering if anyone was aware of this issue. I have not made any follow up runs yet to watch the tach during a repeat, but am pretty sure this is the case. Watch one of the videos and let me know what you think. (right click on links, save) http://www.anotherls1.com/ZL1/1373080689921.3gp http://www.anotherls1.com/ZL1/1373081842122.3gp

07-09-2013, 10:16 AM	#2
2012-1822 Drives: Black ZL1 Join Date: Apr 2013 Location: City of Champions, Alabama Posts: 3,698	I thought you Autos didn't have PTM. __________________ Check out Alabama Camaros, for Camaro enthusiasts all around Alabama https://www.facebook.com/groups/1739...group_activity

07-09-2013, 11:35 AM	#7
Sven59 HAMMER PILOT Drives: 13 ZL1#182, 85 CJ7, 16 Silverado Join Date: Nov 2011 Location: Tucson AZ Posts: 4,386	In mode 5 the car still controlls some functions, try with all nannies off and see if it does it. __________________ "DO YOU WANT ME TO PUT THE HAMMER DOWN?"

07-09-2013, 01:11 PM	#9
roSSco ∞ Smiles per mile Drives: 2013 ZL1 Summit White A6 Join Date: Jun 2009 Location: Arlington, TN Posts: 101 View My Garage	I saw an article that said the transmission shifts at 5800 in Drive and 6000 in Sport mode. Found the article. http://www.gmhightechperformance.com...1/viewall.html __________________ 2013 ZL1 #4739 'Heisenberg' Color - Walter White Roto-Fab CAI On Reddit? Check out /r/ZL1/ Last edited by roSSco; 07-09-2013 at 01:46 PM.

07-09-2013, 10:51 AM	#4
DangerZL1 Drives: 2023 Black ZL1 Auto Join Date: Oct 2009 Location: FEMA Region 4 Posts: 2,935	Hard to tell from watching your video. I'd do a run in your favorite testing area and see where it shifts. I believe there have been some posts saying the auto shifts before redline, but redline may not be the optimal shift point for the auto.

07-09-2013, 11:32 AM	#5
CAM....ZL1 Drives: 2012 ZL1 Join Date: Feb 2012 Location: BENTON, IL. Posts: 1,068 View My Garage	I can certainly tell you that at WOT the auto will and does shift at 5900 rpms.

07-09-2013, 11:35 AM	#6
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

07-11-2013, 07:57 AM	#12
roSSco ∞ Smiles per mile Drives: 2013 ZL1 Summit White A6 Join Date: Jun 2009 Location: Arlington, TN Posts: 101 View My Garage	I did the DA calculations and discovered it was around 3000' which translates into a 12.14 @ 114.9. Not too far off the mark for a stock ZL1. What a relief!