Automatic transmission
09-23-2014, 11:20 AM
#1
4th Gear
Thread Starter
Member Since: Sep 2014
Location: maine
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Automatic transmission
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
09-24-2014, 03:24 PM
#3
Advanced
Member Since: Feb 2010
Location: Houston Texas
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
I had this problem once. Maybe about a week ago, any word from your dealer or GM??
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
09-24-2014, 03:26 PM
#4
Burning Brakes
Member Since: Apr 2006
Location: Aurora Ontario
Posts: 951
Likes: 0
Received 0 Likes
on
0 Posts
09-24-2014, 03:37 PM
#5
Advanced
Member Since: Feb 2010
Location: Houston Texas
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
09-24-2014, 04:24 PM
#8
Burning Brakes
Member Since: Apr 2006
Location: Aurora Ontario
Posts: 951
Likes: 0
Received 0 Likes
on
0 Posts
Service Bulletin
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
09-24-2014, 04:42 PM
#9
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
09-24-2014, 04:59 PM
#10
Service Bulletin
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
09-24-2014, 05:04 PM
#11
Team Owner
Service Bulletin
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
09-24-2014, 05:41 PM
#12
Team Owner
Member Since: Oct 2001
Location: Hotlanta GA
Posts: 36,112
Likes: 0
Received 8 Likes
on
6 Posts
Cruise-In 8 & 10 Veteran
St. Jude Donor '08, '15
Service Bulletin
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
GM Bulletin No.:
Date:
14628
September 2014
SERVICE UPDATE
SUBJECT: Service Update for Inventory Vehicles Only
Drive Audit for Transmission Noise and Loss of Reverse
Vehicle Limited to 3rd and 4th Forward Gear
Expires October 31, 2015
MODELS: 2015 Chevrolet Corvette
Equipped with 8 Speed Automatic Transmission (M5U)
This service update involves vehicles in dealer inventory only and will expire October 31, 2015.
This bulletin provides a service procedure to perform a drive audit on all 2015 model year Corvette vehicles in inventory that are equipped with an 8 speed automatic transmission (M5U). A small number of transmissions may develop a crack in the triple clutch housing internal to the transmission, leading to noise, loss of reverse gear, and limiting the driver to 3rd and 4th forward gears. The drive audit must be completed before vehicle delivery (and in addition to normal pre-delivery inspection activities) to identify vehicles with the condition. If the condition is found, dealers are to replace the transmission under the existing exchange program, see PIP5200A for details.
09-24-2014, 05:55 PM
#13
Just bought my 2014 and I have a similar problem but the cause of mine is the AFM/4-8 cylinder deactivation. I feel it when having gone slow for a while then attempting to accelerate it stumbles and vibrates. If you use paddles to sift (non AFM mode) it runs fine! I bought a tuner to deactivate this POS! GM should have done it like the manual transmissions!
09-24-2014, 06:00 PM
#14
Team Owner
Member Since: Aug 2007
Location: I live my life by 2 rules. 1) Never share everything you know. 2)
Posts: 136,148
Received 2,402 Likes
on
1,366 Posts
St. Jude Donor '11-'12-'13, '16-'17-'18
(apparently some people can't tell the difference between a 2014 and 2015 C7.....) 
09-24-2014, 06:07 PM
#15
apparently someone doesn't know what the first post was referring to!
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
09-24-2014, 11:47 PM
#16
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
Sorry about your transmission concerns. Although I understand your displeasure, it's great that you've proactively reached out to your dealer for an official diagnosis. Keep us in the loop and updated on your service visit. If necessary, I can contact the dealer's Customer Experience Managers if you have additional questions. We'll look forward to your updates
.William R.
Chevrolet Customer Care
09-25-2014, 09:22 AM
#17
Burning Brakes
Member Since: Apr 2006
Location: Aurora Ontario
Posts: 951
Likes: 0
Received 0 Likes
on
0 Posts
apparently someone doesn't know what the first post was referring to!
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
2014 Vette, transmission in drive: whenever i have to slow down and then try to get back into the gas, the car lugs down so much that the car shutters. It's really bad on a hill. As long as I have the highway to myself all is ok. When I first got the car, it spark knocked as I tried to accelerate to get onto the highway, I had to mash the gas pedal to the floor and it then responded. Car has been at dealers for over a week, I have e-mail and phoned Chevrolet. Am I the only one with this problem?
09-25-2014, 10:59 AM
#20
Burning Brakes
When you read his thread you know he is in V4 mode and it has difficulty coming out occasionally and requires heavy throttle activation to hurry the action up. I hate it on mine and have as yet to get resolution from GM. They need to install programming tables from manual shift cars so we can choose this feature or not. These audits are a stall tactic they already know, but haven't decided how to proceed. Most dealer techs are to busy to be auditors and flat rate does not pay them enough.