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Old 01-02-2021, 09:00 PM   #239
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Quote:
Originally Posted by JonDaddy82 View Post
Quote:
Originally Posted by ALLGM6 View Post
Cool, thanks!
JonDaddy82, that one isn't the diff but the rear cradle lockout kit. The diff lockout kit is https://www.bmrsuspension.com/?page=...650&superpro=0.

That said, I think you must have meant to recommend the rear cradle lockout kit to address this problem. I have it on my 2SS that has ZL1 power and wide tires on 1LE wheels, and tracks straight as an arrow at WOT in any gear, provided there is traction to begin with, of course.
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Old 01-04-2021, 03:27 PM   #240
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Originally Posted by ALLGM6 View Post
Hi All- I experience this issue of the left/right sway under hard acceleration. I have 6500 miles on my ZL1 and have noticed the problem since the day I bought it (4 months ago), with 5200 miles on it.



I'm still on stock tires.



I've read through this entire thread in detail looking for answers...



Is the consensus that new tires (going PS4S), BMR Toe Rods, and an alignment will fix the problem!?


I had a 2018 SS before my ZL1 and never had this problem. The lack of confidence and unnerving feeling of going WOT in the ZL1 because of this trammeling issue, has made me regret making the change. The Z is an awesome car otherwise, but the trammeling is taking the fun out of driving it hard. Would love to find a fix for this!!! Thanks for the help.
Hi
I also had a 2017 2ss before,with zero issues with left to right. Put 40k miles on it with no wheel alignment. But with my ZL1 after 5k miles I had the same problem.
New tires did not solve it. But a wheel alignment did. My back was off a lot.
The Zl1 seems to be a lot more sensitive.
Good luck!
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Old 01-04-2021, 03:35 PM   #241
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My '17 ZL1 accelerated dead straight, no matter what speed I was starting from.

My '19 ZL1 1LE pulls to the left a noticeable amount, even after an alignment at the dealership and making sure tire pressures are all the same.
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Old 09-14-2021, 07:58 PM   #242
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Originally Posted by AZ_1LE View Post
My '17 ZL1 accelerated dead straight, no matter what speed I was starting from.

My '19 ZL1 1LE pulls to the left a noticeable amount, even after an alignment at the dealership and making sure tire pressures are all the same.
did you ever find a fix for this for your 19 ZLE?
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Old 09-14-2021, 08:37 PM   #243
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Going with BMR rear suspension stuff across the board coupled with a fresh alignment (that will actually hold with the BMR toe rods!) was a revelation. I’m coming up on 1K WHP and the car hits hard and tracks straight. Even on the street when the car breaks traction it’s clean and predictable, and comes back under control right away. A massive improvement IMO. The BMR stuff is ultra legit.
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Old 09-15-2021, 11:19 AM   #244
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Originally Posted by Joshinator99 View Post
Going with BMR rear suspension stuff across the board coupled with a fresh alignment (that will actually hold with the BMR toe rods!) was a revelation. I’m coming up on 1K WHP and the car hits hard and tracks straight. Even on the street when the car breaks traction it’s clean and predictable, and comes back under control right away. A massive improvement IMO. The BMR stuff is ultra legit.
I've got all the BMR stuff too, and your picture really shows the difference between the stamped sheet steel control arms and the beefy BMR arms.
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Old 09-15-2021, 12:26 PM   #245
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Originally Posted by Mark R View Post
I've got all the BMR stuff too, and your picture really shows the difference between the stamped sheet steel control arms and the beefy BMR arms.
The toe rod difference is even more dramatic, IMO.
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Old 09-15-2021, 12:27 PM   #246
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This post convinced me to purchase the BMR rear cradle lockout kit Also, will be installing a cat back exhaust and figured while I pull some of the stuff off, may as well install a few more BMR chassis bits (will jump into the more suspension orientated stuff like the toe rods/etc down the road when/if I go much past stock power levels lol)
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Old 09-15-2021, 12:45 PM   #247
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My left to right sway under WOT magically disappeared after a new alignment and nitto 555r2 in the rears. Before that is was quite bad. I’ve had the issue another time before as well, but I change tires and other stuff so much I’m
Not sure if it was alignment related or tires.
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Old 09-15-2021, 04:41 PM   #248
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Old 09-15-2021, 05:20 PM   #249
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Waiting for a delivery which should be here but the end of the month and this was not pleasant to read.
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Old 09-15-2021, 07:05 PM   #250
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Again I want to post so it's current, the CUP 2's were 100% of my problem.

I really liked them on track, but the car just felt sketchy on them and all 4 tires would tramline super bad. So any crest in the road would just throw you towards the side of the road under acceleration or waggle back and forth over lane markers.
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Old 09-15-2021, 10:45 PM   #251
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Quote:
Originally Posted by willzilla View Post
This post convinced me to purchase the BMR rear cradle lockout kit Also, will be installing a cat back exhaust and figured while I pull some of the stuff off, may as well install a few more BMR chassis bits (will jump into the more suspension orientated stuff like the toe rods/etc down the road when/if I go much past stock power levels lol)
Quote:
Originally Posted by Mark R View Post
I've got all the BMR stuff too, and your picture really shows the difference between the stamped sheet steel control arms and the beefy BMR arms.
Could you guys share a list of the BMR stuff you would suggest? I would like to do some work on the suspension side of the car. Anything for the front?
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Old 09-15-2021, 10:53 PM   #252
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Quote:
Originally Posted by ALLGM6 View Post
Hi All- I experience this issue of the left/right sway under hard acceleration. I have 6500 miles on my ZL1 and have noticed the problem since the day I bought it (4 months ago), with 5200 miles on it.



I'm still on stock tires.



I've read through this entire thread in detail looking for answers...



Is the consensus that new tires (going PS4S), BMR Toe Rods, and an alignment will fix the problem!?


I had a 2018 SS before my ZL1 and never had this problem. The lack of confidence and unnerving feeling of going WOT in the ZL1 because of this trammeling issue, has made me regret making the change. The Z is an awesome car otherwise, but the trammeling is taking the fun out of driving it hard. Would love to find a fix for this!!! Thanks for the help.

I don't have this issue and i have Michelin AS3+.

I used to have this issue with the Corvette but it was tire related
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