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07-19-2018, 09:30 PM
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#1 |
 Drives: 2018 Chevrolet Camaro ZL1 Join Date: Jun 2018
Location: DFW
Posts: 199
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A10 ZL1 trans “lurch” on cold start?
Car is a 2018 A10 with <2,000 miles on it.
Has anyone else experienced this? I either didn’t notice it for the first 500 miles or it just started happening around then. But, when cold starting only, fire the car up and after about 1-2 seconds after engine starts, the car bucks or lurches a little but. I’m not talking vehicle rolling forward, but a slight buck like the driveshaft is rotating to a hard stop. Very had to describe but I’m hopeful someone’s else has experienced this or knows what I mean? Any thoughts on this? Car is level when parked. TIA! |
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07-19-2018, 09:41 PM
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#2 |
  
Drives: 2018 ZL1 A10/2018 GT350R #JR603 Join Date: Jan 2017
Location: Dublin CA
Posts: 819
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Yes this is normal. Weird thing is my 2017 ZL1 did not do it at all. The 18 started doing it after the transmission was replaced. My car has the most up to date Firm-ware and transmission for a 18 model. Other ZL1 owners have experienced the shake during cold starts and warm starts.
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 2018GT350R+2018 ZL1 "Red Hot" A10 w/ PDR, Nav, Carbon Fiber Hood insert, Carbon Fiber Dash Insert, Carbon Fiber Fuel Dior & Sun Roof. T/M T-Body, Roto Fab & Borla S Type. |
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07-20-2018, 07:54 AM
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#3 |
 
Drives: 2018 ZL1 Join Date: Sep 2017
Location: Texas
Posts: 50
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Yup, mine does the same thing on occasion.
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07-20-2018, 10:24 AM
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#4 |
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Drives: 2018 ZL1 Join Date: Jul 2017
Location: San Jose, Ca
Posts: 135
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Never have felt it.
Do you use your emergency brake?
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Mark E.
2018 ZL1 NGM A10 87 Grand National. Modified Hot Rod for sale *SOLD* 87 Grand National. Stock 65 Olds Vista Cruiser wagon Grand National motor/tran 66 Bronco Rockbuggy 2006 Dodge 2500 4x4 Cummins 6 speed |
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07-20-2018, 10:34 AM
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#5 |
 Drives: 2017 ZL1 Join Date: Aug 2009
Location: Maryland
Posts: 1,052
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Mine has done it since new. Glad to hear it's normal.
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'17 ZL1 10.99@129 stock. 4225# raceweight. Best 60'- 1.66 on factory tires. 10.48@132 E50, intake and tune. 4270 lbs
https://youtu.be/EyHtdH9XOkY https://youtu.be/Lcu41obbTf8 '13 ZL1 BRM A6. 11.591 @ 119.2 factory stock with a 1.68 60'! Best stock mph 121.8. 11.29 @ 123 RotoFab, drag radials and skinnies. 4360# raceweight. http://youtu.be/yggIA3C_kkA 2014... back to stock http://youtu.be/spQLaTWbThs 2013... stock & RotoFab |
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07-20-2018, 02:57 PM
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#6 |
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Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 4,978
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Never seen it on my car on start up while in park. It will move slightly after parking and shutting it off (residual pressure in TQ).
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07-20-2018, 05:53 PM
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#7 |
Drives: 2017 ZL1 A10 White Vert Join Date: Aug 2017
Location: Katy Tx
Posts: 151
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Mine's done this since day one on each cold start up. When it's warm, it doesn't. I have almost 3000 miles and I'm not worried...
Makes it feel like everything is spooling up ready for launch, lol. |
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07-20-2018, 07:27 PM
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#8 |
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Drives: 2018 Chevrolet Camaro ZL1 Join Date: Jun 2018
Location: DFW
Posts: 199
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Thanks for the replies guys. Guess I will chalk it up as an odd A10 quirk though I’d really like to know what the cause is...
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07-20-2018, 09:15 PM
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#9 |
 Drives: 2017 ZL1 Join Date: Feb 2017
Location: Seattle Wa
Posts: 5
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Mine has done it as well since day 1, 2017 ZL1.. I also would like to know.
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07-21-2018, 05:35 AM
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#10 |
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Drives: Red hot ZL1 A10 2017 Join Date: Nov 2016
Location: MS Back to France (29)
Posts: 804
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Normal
Mine did that almost since day one I think there is few words on it somewhere here... Read something about : Let the rest fluid come back in the system Or let the pressure build in the trans Something about the fluid resting in the cooling line which has to come back to engage ... Not sure and don’t Remember but something like that which make sense |
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