Anyone else experiencing this?
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,891
Likes: 109
From: Texas
St. Jude Donor '12
Anyone else experiencing this?
I have a 2015 Stingray Z51. It has a Hennessey HPE 700 package with a Edelbrock super charger. TSP headers and catless X- pipe. Almost every time I put my car into D there is a delay then it goes into gear but hard. Sometimes very hard sometimes easy. I have been told by tuners that it cannot be fixed by being tuned. Here is a short video of what I am trying to convey. Thx in advance. Can't get the video to download. I will get it soon. Hope this works
https://dl-mail.ymail.com/ws/downloa...vzfiNePJFcLA02
https://dl-mail.ymail.com/ws/downloa...vzfiNePJFcLA02
Last edited by 1FASTVERT; Feb 9, 2020 at 02:27 PM.
Advanced
Joined: Nov 2014
Posts: 68
Likes: 23
From: DFW Texas
Bought my wife a 2015 Z51 3LT A8 in the fall of 2014 that had this issue. 10 months later after many trips to the dealer and no fixes traded for a 2016 and no more problems. Wife was afraid of the car and was scared to drive it. Can't say I blame her as it was very disturbing and unpredictable.
Administrator
Joined: Mar 2001
Posts: 368,779
Likes: 24,900
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Perhaps time for a trip to the dealer. It should not hit hard when going into gear. My ‘14 does not do this.
Racer
Joined: Dec 2018
Posts: 485
Likes: 168
From: Gainesville, Ga.
Almost every time I put my car into D there is a delay then it goes into gear but hard. Sometimes very hard sometimes easy. I have been told by tuners that it cannot be fixed by being tuned. Here is a short video of what I am trying to convey. Thx in advance. Can't get the video to download. I will get it soon.
Safety Car
Joined: Nov 1999
Posts: 4,294
Likes: 1,166
From: Green and Wet Western Oregon
2023 C7 of the Year Winner - Unmodified
2018 C6 of Year Winner
Research TSB 18-NA-355. Transmission shudder & harsh engagement seem to be a symptom of transmission fluid. Some transmissions can be fixed by a simple fluid change.
Racer
Joined: Dec 2018
Posts: 485
Likes: 168
From: Gainesville, Ga.
I had the shudder v4 and v8 mode thing...and my dealer did the latest triple flush...It fixed the shudder...but now on occasion I have the "lurch" thing going on after a cold start (with proper warm up before putting it in drive) it lasts a week or so then it goes away on its own...wanting to OP's video to see if he has the same thing...Somewhere along the line on the forum it was reported to be some sort of seal that was supposedly leaking...but mine comes and then it goes...one would think that a seal that leaks would continue to leak and not just "fix itself"...frustrating, but way worth the ownership of the car!
Racer
Joined: Dec 2018
Posts: 485
Likes: 168
From: Gainesville, Ga.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years
Joe Kucinski
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!
Michael S. Palmer
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,891
Likes: 109
From: Texas
St. Jude Donor '12
Racer
Joined: Dec 2018
Posts: 485
Likes: 168
From: Gainesville, Ga.
Bought my wife a 2015 Z51 3LT A8 in the fall of 2014 that had this issue. 10 months later after many trips to the dealer and no fixes traded for a 2016 and no more problems. Wife was afraid of the car and was scared to drive it. Can't say I blame her as it was very disturbing and unpredictable.
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,891
Likes: 109
From: Texas
St. Jude Donor '12
I pulled up the bulletin but it only pertains to a shudder from 25 to 80 mph. The problem I have is put the car into drive and there is a 3 second delay then bam it slams into gear even with my foot firmly on the brake.
Racer
Joined: Dec 2018
Posts: 485
Likes: 168
From: Gainesville, Ga.
I can't say that that is the same feeling I get 1 fast vert...I have my foot on the brake petal regardless when I shift the car like all should....I find that mine slips into gear without a jerk or delay, unlike yours...when I let of the brake pedal mine "lurches forward" and you have to be ready with proper steering direction set in place and feather the brake pedal...then all is fine after this for the rest of the day...and it only happens at random and lasts for a week or so then goes away on its own for months. We seem to have problems with the same style and year of car, but now its sounds like we may have different issues...My Z-51 A-8 is fairly stock with no tunes...just an AWE X Pipe, Vararam CAI...and a lot of cosmetic mods...best of luck....successful video would be very helpful...
Advanced
Joined: Nov 2014
Posts: 68
Likes: 23
From: DFW Texas
[QUOTE=1FASTVERT; The problem I have is put the car into drive and there is a 3 second delay then bam it slams into gear even with my foot firmly on the brake.[/QUOTE]
That is the same symptom we were having. Often times able to back down the driveway into the street, put the car in drive.... 3,2,1,BANG, JUMP! Having both feet firmly planted on the brake the car would still jump forward.
Best I recall the 1st 900 or so A8 transmissions had this feature. I believe the torque converter was draining down after sitting a while. Once started again it took some time to build up pressure, reprime, refill etc. Do not know what the final fix was as we got tired of being BETA tested for every new software/whatever fix there was to no avail.
That is the same symptom we were having. Often times able to back down the driveway into the street, put the car in drive.... 3,2,1,BANG, JUMP! Having both feet firmly planted on the brake the car would still jump forward.
Best I recall the 1st 900 or so A8 transmissions had this feature. I believe the torque converter was draining down after sitting a while. Once started again it took some time to build up pressure, reprime, refill etc. Do not know what the final fix was as we got tired of being BETA tested for every new software/whatever fix there was to no avail.
Team Owner
Joined: Jan 2007
Posts: 29,066
Likes: 1,839
From: cookeville tennessee