[TJay74]

I have a 2017 SS 1LE, when it was 460rwhp on E85 I never had any issues with the car walking around while under power. now that have a Procharger D1SC on the car and making 650rwhp the car walks all over the road at times when it is under WOT.

I have checked the alignment, it isnt the tires are they are a dang near new set of MP4S tires. I am almost for sure it is the eLsd and the tuning. pretty sure the eLsd is seeing the power and trying to compensate by moving power back and forth.

[seanblurr]

I wanted to update this with my experiences. Lots of talk about tires and alignment, some claim these caused/fixed the issue while others say this isn't the problem.

Well. I had a KNOWN alignment issue, as in, I had front and rear toe that was fairly out of wack. The car was simply undriveable, the rear end creep was the worst it has ever been. I got my car on an alignment rack, replaced all the bolts, brought the specs back where they should be (1/16th out front, 1/16th in rear toe) and the car is now straight as an arrow.

This entirely unscientific study supports the theory rear-end creep is caused by front and or rear toe being off.

[mlee]

Originally Posted by seanblurr

I wanted to update this with my experiences. Lots of talk about tires and alignment, some claim these caused/fixed the issue while others say this isn't the problem.

Well. I had a KNOWN alignment issue, as in, I had front and rear toe that was fairly out of wack. The car was simply undriveable, the rear end creep was the worst it has ever been. I got my car on an alignment rack, replaced all the bolts, brought the specs back where they should be (1/16th out front, 1/16th in rear toe) and the car is now straight as an arrow.

This entirely unscientific study supports the theory rear-end creep is caused by front and or rear toe being off.

I didn't have my car long after an alignment but I don't remember experiencing this afterwards. And I ran the crap out of it a few days before trading in.

[bobby35ny]

Originally Posted by seanblurr

I wanted to update this with my experiences. Lots of talk about tires and alignment, some claim these caused/fixed the issue while others say this isn't the problem.

Well. I had a KNOWN alignment issue, as in, I had front and rear toe that was fairly out of wack. The car was simply undriveable, the rear end creep was the worst it has ever been. I got my car on an alignment rack, replaced all the bolts, brought the specs back where they should be (1/16th out front, 1/16th in rear toe) and the car is now straight as an arrow.

This entirely unscientific study supports the theory rear-end creep is caused by front and or rear toe being off.

did you take to a dealer or a alignment shop?

[Artos]

I got the BMR lockout kit along with the upper / lower / control arms on the way...I'll report back whenever I can make time to get the install done.

[waterman]

[Rodan]

Originally Posted by Artos

I got the BMR lockout kit along with the upper / lower / control arms on the way...I'll report back whenever I can make time to get the install done.

I installed the BMR lockout kit this weekend. Reduced the rear 'wiggle' by ~80%. Not quite as good as solid bushings, but far easier to install...

[GunMetalGrey]

I'm getting an alignment this Friday because of what seems to be an alignment issue (my right rear passenger side tire is corded on the inside when the other side hasn't even worn to the tread wear indicators) and will update the impact this has on that "left to right swaying feel" with a post on the weekend.

I'm also getting the rear cradle lock out kit installed soon and will give an update on the impact of that as well.

[GunMetalGrey]

Originally Posted by Rodan

I installed the BMR lockout kit this weekend. Reduced the rear 'wiggle' by ~80%. Not quite as good as solid bushings, but far easier to install...

Reduced wiggle as in left to right or right to left swaying feeling when going in a relatively straight line?

[Rodan]

For me, the rear instability was most apparent under hard acceleration with a slight direction change, passing on a two-lane road for example.

[GunMetalGrey]

Originally Posted by Rodan

For me, the rear instability was most apparent under hard acceleration with a slight direction change, passing on a two-lane road for example.

Gotchya, thanks for clarifying

[Pepsiguru]

2018 ZL1 A10, same issue. thought that the solid rear cradle mounts would fix this ? Am I wrong ?





Thanx in advanced

[GunMetalGrey]

Originally Posted by Pepsiguru

2018 ZL1 A10, same issue. thought that the solid rear cradle mounts would fix this ? Am I wrong ?





Thanx in advanced

I've heard some say it does and some say it doesn't, but perhaps that's because 2 different things are being talked about.

[Fraxum]

I have seen that more than once at Atco on my 17" MTs SSes, but not on every run even at below 20 pounds. My theory is the ZL1 aero is sensitive to crosswinds especially as you approach 130 mph.

Just a guess.