[Gunkk]

Vert has different springs and AFAIK was never part of this TSB. But given that the weight of a vert is the same as couple+1pax, you could put in some coupe front springs and lower by about 1/4" or so ... which is about the same as everyone has seen with the newer springs in their coupes.

[FASTNUF]

Originally Posted by 69 Z11

Was wondering if anyone can confirm the OLD spring part number. We bought a used 2017 ZL1 vert with a build date of 4-18 which is after the TSB cutoff date. The gap on our car appears to be pretty big. Took it into the dealer and they said it doesn't meet the requirements for the TSB and new springs because of the build date. The part number on the springs in the car is 84186926 and the correct "new" spring should be 84312736 (for a vert). Can anyone confirm that these are the old springs even though the build date is after 4/12?

I have a 2017 ZL1 Vert with build date of 5/17 when new measured 27 & 7/8" front & back from level garage floor to wheel arch, however NOW with almost 3000 miles and 13 months of ownership, it's sitting just below 27 1/2" all the way around. BTW - mine was built after yours (about a month newer) and I have the same 84186926 front springs as you show in your picture.
I'm good with mine as sitting next to a coupe, mine seems to be lower on factory springs.

[mdmoore23]

Originally Posted by Gunkk

Vert has different springs and AFAIK was never part of this TSB. But given that the weight of a vert is the same as couple+1pax, you could put in some coupe front springs and lower by about 1/4" or so ... which is about the same as everyone has seen with the newer springs in their coupes.

The vert was part of it. That's why the were 2 part numbers for the springs.

[Gunkk]

Originally Posted by mdmoore23

The vert was part of it. That's why the were 2 part numbers for the springs.

Correct you are. I just re-read the TSB:

https://www.camaro6.com/forums/attac...6&d=1504825478

[69 Z11]

Dealer completed my spring swap, here is a before and after photo. I've also included a picture of the newest edition of TSB #17-NA-208 (which confirms the different spring part numbers for coupe and vert). Very happy with the ride height improvement. My car was built on April 17, 5 days after the cutoff of the older springs. Still not 100% sure if my original springs were the old ones or not, but they did have a different part number than the new TSB ones. FYI, the car dropped about 1/4" more as the springs settled in over the last 10 days, exactly as someone said earlier. The picture below shows the final ride height. The car needed alignment after the service, it was way off, don't forget to have that done. Hope this helps the next guy!

[Biscuit.fr]

I’m not sure if the BS with the date of 04/12/17 is the right date...
According to this forum (Becky’s topic) and the sequence my TPW was 04/10/17
But recently after receiving the build sheet of my car, it shows 03/31/17.
Also check the stickers on the door showing 03/2017
I’m a little bit confused!!!!

Now I pretty sure my ZL1 A10 was built 03/31/2017
(Thought it was the week from 10-17 apr)

But the measurements are like the new set of springs in your second picture (27.5)
???

[69 Z11]

If the ride height is good, not sure I would mess with it. Can you get a picture of the part number of your springs? I'm curious what is in yours.

[Biscuit.fr]

Just checked mine
It’s 84312735 as in the BTS
Right height
But as I stated my car shows a 03/2107 build date sticker,
And according to my build sheet emailed me by socialGM
The build date was 03/31/2017

Never been to the dealer after for any kind of update
(Only once, One free oil change, and was there to stop them doing weird stuff with std oil...)

So?
I’m a lucky guy
Or 04/12 is bull shit but GM needs one date for the BTS....

[69 Z11]

I think you are right on both, I was already pretty sure on the second. Congrats and thanks for checking!