Zl1 A10 Shifting Issues on Track

lmcgrew79 · 07-20-2017, 10:48 AM

Taking the car in today for service to see if they can do anything about this, it seems to happen around 6-7 laps in. Im driving the car pretty hard but not abusive it was on 80 degrees outside. Ive also has had a pretty harsh downshift from 4th to 3rd since ive had it but i thought that may be normal? IDK Hope they can do something. I love the trans but if it isnt gonna hold to 5 or 6 laps then this is a major problem.

Mr. Meh · 07-20-2017, 11:14 AM

If you've had harsh downshifts since you had it, it's possible there's just something up with the unit and not the model as a whole.

I have a track day on 8/7 an mine's been great otherwise (no hard shifts as you've listed), so we'll see if I have similar issues.

BMWM.D. · 07-21-2017, 09:08 AM

It looks like it's slipping on those shifts. Is the car stock?

Eric SS · 07-21-2017, 09:43 AM

I didn't watch the whole video but if that wasn't wheelspin at 1:13 in the video then that is definitely not right. No way your tranny should flare like that, especially already being in gear. I would take that in.

DrkPhx · 07-21-2017, 11:10 AM

I agree with the others; sounds like it's slipping on some of the upshifts. I didn't notice the trans fluid temp. What was the temp and what's considered normal for the A10?

Stephen12ZL1 · 07-21-2017, 12:07 PM

Get them to double check obvious things like fluid level and TCM software updates. We're you using the paddles or not when this crazy shifting occurred?

2SSRS@Gen5diy · 07-21-2017, 12:11 PM

Quote:

Originally Posted by DrkPhx

I agree with the others; sounds like it's slipping on some of the upshifts. I didn't notice the trans fluid temp. What was the temp and what's considered normal for the A10?

the trans temps got to from 265-285, its on the video.

lmcgrew79 · 07-21-2017, 04:02 PM

Gm Engineer coming to my dealer next week to check it out. Will keep you'll updated.

camaro5 · 07-21-2017, 11:43 PM

Sounds like not lagging, but slipping.

Typical causes are slipping clutch packs, or a sticky solenoid.

Not the torque converter because it doesn't slip in all gears.

Best thing they could do is replace the whole tranny.

Bunksy · 07-22-2017, 04:24 AM

Video isn't working for me so I can't comment but I too am having intermittent gear shift issues with my A10.

When driving my ZL1 hard the shift from 4th to 5th can be really aggressive. It's happened to me a few times now. I'll try to replicate it while recording on the PDR so I can show my dealer... (along with all the other 'new car' faults!)

07-21-2017, 12:07 PM	#6
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,824	Get them to double check obvious things like fluid level and TCM software updates. We're you using the paddles or not when this crazy shifting occurred? __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-21-2017, 11:43 PM	#9
camaro5 Drives: X-15 Velocipede Join Date: Mar 2008 Location: SW Florida Posts: 4,630	Sounds like not lagging, but slipping. Typical causes are slipping clutch packs, or a sticky solenoid. Not the torque converter because it doesn't slip in all gears. Best thing they could do is replace the whole tranny. __________________ Go from the presence of a foolish man, when thou perceivest not in him the lips of knowledge General Motors ASEP, A.S. Automotive Technology, Telecommunications Specialist, CISCO Network Engineer STANDARD DISCLAIMER camaro5 is furnishing this information "as is". camaro5 does not provide any warranty of the information whatsoever, whether express, implied, or statutory, including, but not limited to, any warranty of merchantability or fitness for a particular purpose or any warranty that the contents of the information will be error-free.

07-20-2017, 11:14 AM	#2
Mr. Meh Drives: Sold Join Date: Mar 2017 Location: Somewhere Posts: 775	If you've had harsh downshifts since you had it, it's possible there's just something up with the unit and not the model as a whole. I have a track day on 8/7 an mine's been great otherwise (no hard shifts as you've listed), so we'll see if I have similar issues.

07-21-2017, 09:08 AM	#3
BMWM.D. Drives: ZL1/335i Join Date: Apr 2014 Location: Santa Barbara Posts: 870	It looks like it's slipping on those shifts. Is the car stock?

07-21-2017, 09:43 AM	#4
Eric SS #becauseracecar Drives: 2016 SS Sedan, 2016 Camaro SS Join Date: May 2015 Location: Phoenix Posts: 2,959	I didn't watch the whole video but if that wasn't wheelspin at 1:13 in the video then that is definitely not right. No way your tranny should flare like that, especially already being in gear. I would take that in.

07-21-2017, 11:10 AM	#5
DrkPhx Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011 Location: MN Posts: 2,250	I agree with the others; sounds like it's slipping on some of the upshifts. I didn't notice the trans fluid temp. What was the temp and what's considered normal for the A10?

07-21-2017, 04:02 PM	#8
lmcgrew79 Drives: '17 Zl1, '16 Viper ACR, '15 CLA 45 Join Date: Nov 2014 Location: Hurricane, WV Posts: 168	Gm Engineer coming to my dealer next week to check it out. Will keep you'll updated.

07-22-2017, 04:24 AM	#10
Bunksy Drives: Gen 6 ZL1 White Join Date: Jul 2017 Location: Dubai Posts: 12	Video isn't working for me so I can't comment but I too am having intermittent gear shift issues with my A10. When driving my ZL1 hard the shift from 4th to 5th can be really aggressive. It's happened to me a few times now. I'll try to replicate it while recording on the PDR so I can show my dealer... (along with all the other 'new car' faults!)

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