Transmission problem?
Thread Starter
Instructor
Joined: May 2005
Posts: 118
Likes: 7
Transmission problem?
Hello all,
Not sure what is going on, but it seems as if my Z51 may be having a transmission issue (VIN# 8913). I have 600 miles on the car and from the very beginning, it has felt sluggish and seems to change gears very slowly. To me, it has a very apparent delay when you step o the gas. Yesterday, I decided to give it a little push and got it up to 105 mph coming off of a very long bridge here in New Orleans. As I came to a red light after the acceleration, the car seems as if it did not down shift properly and the engine was revving very high, but not moving. As I came to a complete stop, I felt a "clunk" and the engine rev's came down. I've been reading about the rev-match and the issues some have voiced with it. Seeing that I'm VIN# 8913, I would figure that it isn't because of the lack of transmission oil as some have reported in earlier VIN#'s. I don't know if it is me, but it just doesn't seem to have any pickup when you step on the gas. I mostly drive in sport mode, which is where it was when this happened.
Any insight is greatly appreciated.
Not sure what is going on, but it seems as if my Z51 may be having a transmission issue (VIN# 8913). I have 600 miles on the car and from the very beginning, it has felt sluggish and seems to change gears very slowly. To me, it has a very apparent delay when you step o the gas. Yesterday, I decided to give it a little push and got it up to 105 mph coming off of a very long bridge here in New Orleans. As I came to a red light after the acceleration, the car seems as if it did not down shift properly and the engine was revving very high, but not moving. As I came to a complete stop, I felt a "clunk" and the engine rev's came down. I've been reading about the rev-match and the issues some have voiced with it. Seeing that I'm VIN# 8913, I would figure that it isn't because of the lack of transmission oil as some have reported in earlier VIN#'s. I don't know if it is me, but it just doesn't seem to have any pickup when you step on the gas. I mostly drive in sport mode, which is where it was when this happened.
Any insight is greatly appreciated.
Race Director
Joined: Dec 2002
Posts: 10,461
Likes: 1,148
From: Wayne Township WI
Get your car back to the dealer w/ a detailed account of your experience, here. Given your description something's wrong, sluggish' is not what these new C7s are. 
Good luck, hoping whateveritiswrong can and will be rectified & DO keep the forum appraised what happens.
Good luck, hoping whateveritiswrong can and will be rectified & DO keep the forum appraised what happens.
Safety Car
Joined: Apr 2007
Posts: 4,547
Likes: 609
From: Southeast, WI
Rev match is used in the manual transmission. You seem to have an auto.
The transmission oil you asked about is not the issue. The problem you might have been referring to was the edif fluid. This doesn't relate to the problem you might be having.
Take it to the dealer and have them evaluate.
Let us know how it turns out.
The transmission oil you asked about is not the issue. The problem you might have been referring to was the edif fluid. This doesn't relate to the problem you might be having.
Take it to the dealer and have them evaluate.
Let us know how it turns out.
Pro
Joined: Feb 2011
Posts: 535
Likes: 20
From: TX
Stopping at the red light and then a sluggish take out is because it is not down shifting into the gear you would usually take off in. The clunking noise is made when you give it enough gas on the sluggish take off that it makes the transmission downshift into first. Could be a bad shift solenoid or there may be metal particles in the fluid that are causing problems. Bottom line it is not right and needs to go to the dealer for warranty work or trade it in on a 2015 which will have an eight speed auto trans. Good luck.
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
If the OP is operating an Automatic C7 in Tr-track mode & manually shifting the gears, it won't shift anything for you EXCEPT if he puts the vehicle close to doing internal damage to the engine, trans, or other systems. This could be even worse, if he entered into any of the Performance Driving Modes.
Isn't that correct or am I dream that little blonde in the C7 tutorial videos said that???
Wormwood
Isn't that correct or am I dream that little blonde in the C7 tutorial videos said that???
Wormwood
Racer
Joined: Aug 2013
Posts: 400
Likes: 1
Hello all,
Not sure what is going on, but it seems as if my Z51 may be having a transmission issue (VIN# 8913). I have 600 miles on the car and from the very beginning, it has felt sluggish and seems to change gears very slowly. To me, it has a very apparent delay when you step o the gas. Yesterday, I decided to give it a little push and got it up to 105 mph coming off of a very long bridge here in New Orleans. As I came to a red light after the acceleration, the car seems as if it did not down shift properly and the engine was revving very high, but not moving. As I came to a complete stop, I felt a "clunk" and the engine rev's came down. I've been reading about the rev-match and the issues some have voiced with it. Seeing that I'm VIN# 8913, I would figure that it isn't because of the lack of transmission oil as some have reported in earlier VIN#'s. I don't know if it is me, but it just doesn't seem to have any pickup when you step on the gas. I mostly drive in sport mode, which is where it was when this happened.
Any insight is greatly appreciated.
Not sure what is going on, but it seems as if my Z51 may be having a transmission issue (VIN# 8913). I have 600 miles on the car and from the very beginning, it has felt sluggish and seems to change gears very slowly. To me, it has a very apparent delay when you step o the gas. Yesterday, I decided to give it a little push and got it up to 105 mph coming off of a very long bridge here in New Orleans. As I came to a red light after the acceleration, the car seems as if it did not down shift properly and the engine was revving very high, but not moving. As I came to a complete stop, I felt a "clunk" and the engine rev's came down. I've been reading about the rev-match and the issues some have voiced with it. Seeing that I'm VIN# 8913, I would figure that it isn't because of the lack of transmission oil as some have reported in earlier VIN#'s. I don't know if it is me, but it just doesn't seem to have any pickup when you step on the gas. I mostly drive in sport mode, which is where it was when this happened.
Any insight is greatly appreciated.
He obvioulsy has no clue and probably doesn't actually own a C7!
Automatics don't have rev matching!
No reports for a lack of transmission "oil".
He's either a FAKE or JUST STUPID!
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Burning Brakes
Joined: Jan 2013
Posts: 755
Likes: 2
From: Valencia CA
Team Owner
Joined: Aug 2007
Posts: 136,140
Likes: 2,432
From: I live my life by 2 rules. 1) Never share everything you know. 2)
St. Jude Donor '11-'12-'13, '16-'17-'18
Page 9-32 of the Owners Manual:
Active Rev Match
Vehicles equipped with a manual
transmission [emphasis added]
have Active Rev Match
(ARM). ARM aids in smoother
shifting by matching the engine
speed to the next selected gear. By
monitoring shift lever and clutch
operation, ARM adjusts engine
speed to match a calibrated value
based on gear selection. On
upshifts and downshifts, engine
speed will be increased and
decreased to match vehicle road
speed and transmission gear
position. ARM is maintained for a
few seconds between shifts, then
deactivates if the shift is not
completed.
Vehicles equipped with a manual
transmission [emphasis added]
have Active Rev Match
(ARM). ARM aids in smoother
shifting by matching the engine
speed to the next selected gear. By
monitoring shift lever and clutch
operation, ARM adjusts engine
speed to match a calibrated value
based on gear selection. On
upshifts and downshifts, engine
speed will be increased and
decreased to match vehicle road
speed and transmission gear
position. ARM is maintained for a
few seconds between shifts, then
deactivates if the shift is not
completed.
Safety Car
Joined: Feb 2013
Posts: 4,875
Likes: 1,174
Here is a link to a discussion on it below... since '08 this has been a feature on Corvette autos. So, he wasn't joking and if "we all know the A6 does not have rev matching" then we might all be wrong
http://forums.corvetteforum.com/c7-g...nsmission.html
When the auto downshifts when using the paddles, it blips the throttle to allow the car to downshift more quickly while not unsettling the car. The reason we hear so much about this on the M7 is that it is new and rare for a manual car to do the same thing.
Last edited by gthal; Dec 29, 2013 at 03:25 PM.
Burning Brakes
Joined: Jun 2013
Posts: 1,193
Likes: 342
From: St. Louis MO
No joke. The A6 rev matches and shifts as fast as the M7. I have driven BOTH and own an A6. I would have no problem tracking my A6 Z51 and have no fear of getting out-shifted by a manual. It's that good. Anyone who says otherwise hasn't actually driven the C7 with the A6.
Racer
Joined: Oct 1999
Posts: 414
Likes: 13
From: Orlando FL
St. Jude Donor '05-'06-'07-'14, '21
Drifting
Joined: Jun 2013
Posts: 1,764
Likes: 10
From: Cumming GA
On order: Torch Red Z51
No, some of us actually use it with the A6. When downshifting with the paddles it has the rev matching. Plus if you've been driving aggressively in the mountains in sport or track mode and move the selector from manual back to auto, hitting the brakes causes downshifting at pretty high RPM's as if you were doing it with the paddles. The more opportunity I get to play with this tranny, the more I like/love it 
.
Z51, A6, and mag ride.
. Z51, A6, and mag ride.