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I just bought a 2019 c7 z06 with 40k, looking through all the service history GM’s an carfax and talking to the dealer that serviced it for the previous 2 owners it seems they were good on maintenance and changed/flushed items like brake fluid and differential fluid at about 25k miles,
I have put about 500 miles on it and from what I can tell no tranny problems after I put the range device in place, it seemed flaky before that but now I realize that was more 4/8 changes.
the gm power train warranty expired 5/10/24 so I just missed that and supposedly the option for free triple flush since I purchased on 5/13/24, I did purchase a 3rd party extended 12/12 power train warranty from selling dealer.
since I don’t know if a triple flush was done I wanted to do it as a precaution, it seems a couple transmission shops in my area will do a filter change and complete flush and fill with the correct hp fluid for substantially less than the local dealer wants to do the “triple flush” tsb,
the maintenance schedule shows fluid and filter change at 45k miles since it is out of gm warranty which route would you guys suggest , transmission specialist or dealer??
fyi build date was 9/18 so not sure if it had new fluid or not
Get the triple flush done by someone with the correct equipment. I just had it done on a 2019 I just purchased. If a single flush was sufficient to fix the problem, GM would have specified that as it would cost them much less. They are always going to specify the least expensive solution that works. Corvettes were just a small percentage of the A8's that required a triple flush, so GM would have saved huge money on a single flush.
Mine was 9/18, I had seen a couple different dates but I think you are correct that 2/19 was the date of new fluid, I can only assume since there was no recall or anything sent to owners and if the owners of my car did not complain to the dealer about shudder it would not have been done, also if they weren’t part of any forums or social places that talked about it again probably did not get it done
since I don’t know if a triple flush was done I wanted to do it as a precaution, it seems a couple transmission shops in my area will do a filter change and complete flush and fill with the correct hp fluid for substantially less than the local dealer wants to do the “triple flush” tsb,
the maintenance schedule shows fluid and filter change at 45k miles since it is out of gm warranty which route would you guys suggest , transmission specialist or dealer??
2 different processes, 2 different prices. Kinda like saying it costs less to paint 1 room than the whole house. Considering that GM will pay for 3.8 hours and 24 quarts of fluid, you will pay for AT LEAST that. I would prefer not to go to the transmission place since they don't know the process but since you already have the correct fluid, you can settle for either or. Just be sure to get the quote so you can see what the labor, labor rate and fluid cost is to do the job. My suggestion is to get to know your Corvette certified tech and not rely on the shop. This is as good as any job to get to meet the guy. There are only a couple at any given shop. Watch the guy work and see if he slops things together or he is detail oriented. IF he works well on someone's car, it is more likely he will do the same kind of job on your car. After which, you can use him for bigger jobs you don't want to DIY.
Mine was 9/18, I had seen a couple different dates but I think you are correct that 2/19 was the date of new fluid, I can only assume since there was no recall or anything sent to owners and if the owners of my car did not complain to the dealer about shudder it would not have been done, also if they weren’t part of any forums or social places that talked about it again probably did not get it done
No recall was ever issued, only a TSB. You either had to ask the dealer about it or report having the problem and hope the dealer was knowledgeable about the TSB.
All A8 transmissions require 24 quarts of Blue Label ATF for the change, Corvettes included.
Only the Corvette does not use the fluid change adaptor due to fact that it won't fit in the tight space required, thus requiring dropping the pan 3X.
On the Corvette the 'machine' only pumps new fluid into the transmission.
so basically this is actually a “drain and fill” x3 but called a flush,
they use the adapter they have made to fill via the level set plug and use the pressure of the machine to fill, this seems to be done this way so they don’t have to try and remove the fill plug.
getting a better feel for the process now, thanks for the input
Congratulations on your new 19 Z06. My 19 GS was built 10/18 and my trans stated the shudder at approx 35K miles. My dealer did the triple flush and no issues since. Given that the issue is the trans fluid (attracts moisture), I would recommend you have your dealer do the TSB triple flush to ensure all of the old fluid is removed. A simple drain will not remove all of the old fluid. It will probably be expensive, depending on your location, but worth it in the long run. Good luck.
I just bought a 2019 c7 z06 with 40k, looking through all the service history GM’s an carfax and talking to the dealer that serviced it for the previous 2 owners it seems they were good on maintenance and changed/flushed items like brake fluid and differential fluid at about 25k miles,
I have put about 500 miles on it and from what I can tell no tranny problems after I put the range device in place, it seemed flaky before that but now I realize that was more 4/8 changes.
the gm power train warranty expired 5/10/24 so I just missed that and supposedly the option for free triple flush since I purchased on 5/13/24, I did purchase a 3rd party extended 12/12 power train warranty from selling dealer.
since I don’t know if a triple flush was done I wanted to do it as a precaution, it seems a couple transmission shops in my area will do a filter change and complete flush and fill with the correct hp fluid for substantially less than the local dealer wants to do the “triple flush” tsb,
the maintenance schedule shows fluid and filter change at 45k miles since it is out of gm warranty which route would you guys suggest , transmission specialist or dealer??
fyi build date was 9/18 so not sure if it had new fluid or not
Thanks for the input
thanks for the advice, looking at dealer options now, ranging from 600 to 1300 , trying ti get my local dealer who is the 1300 to try and get my 3rd party extended warranty to cover it, that would best case, fingers crossed
thanks for the advice, looking at dealer options now, ranging from 600 to 1300 , trying ti get my local dealer who is the 1300 to try and get my 3rd party extended warranty to cover it, that would best case, fingers crossed
Forget the cost. Look at the details of how they got the cost. The $600 might be just a pan drop hence the low price.
Forget the cost. Look at the details of how they got the cost. The $600 might be just a pan drop hence the low price.
I guess that is why I balk at the 1300 the tsb shows a little less than 3 hours and then even at gm price fluid should not be over $350 since I am at 40k miles I was going to have them swap out filer as well so with a 3 hour job and parts associated 1300 seems like a stretch , I am fine with 600 to 700 but I would like ti see justification of that price, the dealer that is quoting 600 was just going off of the tsb, the $1300 dealer said yea we know what it is and price is 1300, this is also the same dealer who told me it was 350 for fluid change or 1500 for fluid and filter because they had to drop exhaust, we all know that is generally not the case
i would also like to know where the word “flush” gets associated with this service, even the gm tsb calls it a “triple drain and fill” I get criticized in the forum being skeptical of what is being done by the dealers as I see nothing more than draining the fluid and filling it back up 3 times,
I guess that is why I balk at the 1300 the tsb shows a little less than 3 hours and then even at gm price fluid should not be over $350 since I am at 40k miles I was going to have them swap out filer as well so with a 3 hour job and parts associated 1300 seems like a stretch , I am fine with 600 to 700 but I would like ti see justification of that price, the dealer that is quoting 600 was just going off of the tsb, the $1300 dealer said yea we know what it is and price is 1300, this is also the same dealer who told me it was 350 for fluid change or 1500 for fluid and filter because they had to drop exhaust, we all know that is generally not the case
i would also like to know where the word “flush” gets associated with this service, even the gm tsb calls it a “triple drain and fill” I get criticized in the forum being skeptical of what is being done by the dealers as I see nothing more than draining the fluid and filling it back up 3 times,
My bad. I thought it was 3.8 when it was 2.8. Do remember that's what warranty pays for the job which is often less than what you pay. Multiply the labor rate by 3 and parts counter fluid cost by 24 and that's an appropriate approximate of the job. I don't go by number alone. I go with the parts and labor quotes. I would not expect more than 4 hours of labor if warranty pays 2.8 hours.
I go with a breakdown so I know how many hours he plans to spend. Also I have heard of vast differences in the labor rate.
I also would speak to the tech and not the secretary making the appointment.
Tranny advice
Ask the dealer if they have done this process before
