CAMARO6 - View Single Post - Shimmy on hard accelleration & higher speeds

MrChrisLS3 · 10-03-2019, 08:13 AM

So is it a "shimmy" or is it "pulling". Post is a little confusing.

The above post is pretty accurate in what may be the cause. But there are still some unknowns to play this game.

Is the suspension kit a fresh install?
If not, how many miles on it?
If it was done some time ago, did this just start?
If above is true, can you recall any pot hole, speed bump, curbing events?
Does it shimmy/pull every time regardless of the road you're on?
Does pull to one side or the other under hard braking?
If it's a shimmy, do you feel it more in the steering wheel, or the seat?
If it's a pull, do you seem to have to consistently fight it, or does it stop when you stop accelerating?

Lowering the car will stiffen the suspension and you will get more feedback from it. So if this was the first pull you've done since install, it is possible that you are just feeling more of what happens naturally when accelerate hard. Unless, of course we are talking about a shimmy, a.k.a. wobble, that's always bad.

Also, about the alignment, was the last one done right after the installation, or has another one been done since? When doing an aftermarket suspension like this, many shops recommend bringing it back after 500 miles or so to check the torque and realign.

Regardless, the correct answer to your question is to take it back to the installer with a clear description of what it's doing, and have them check torque on the bolts, and fine tune the alignment. This should just be part of the deal. I know that the shop that does all of our lifts on our trucks and Jeeps for our dealership will call the customer that bought it and tell them to bring it in after 500 miles so they can check everything. I know a lift and lowering are different things, but the principle is the same.

10-03-2019, 08:13 AM	#5
MrChrisLS3 Drives: 2018 1SS M6 Join Date: Nov 2014 Location: Houston Posts: 2,617	So is it a "shimmy" or is it "pulling". Post is a little confusing. The above post is pretty accurate in what may be the cause. But there are still some unknowns to play this game. Is the suspension kit a fresh install? If not, how many miles on it? If it was done some time ago, did this just start? If above is true, can you recall any pot hole, speed bump, curbing events? Does it shimmy/pull every time regardless of the road you're on? Does pull to one side or the other under hard braking? If it's a shimmy, do you feel it more in the steering wheel, or the seat? If it's a pull, do you seem to have to consistently fight it, or does it stop when you stop accelerating? Lowering the car will stiffen the suspension and you will get more feedback from it. So if this was the first pull you've done since install, it is possible that you are just feeling more of what happens naturally when accelerate hard. Unless, of course we are talking about a shimmy, a.k.a. wobble, that's always bad. Also, about the alignment, was the last one done right after the installation, or has another one been done since? When doing an aftermarket suspension like this, many shops recommend bringing it back after 500 miles or so to check the torque and realign. Regardless, the correct answer to your question is to take it back to the installer with a clear description of what it's doing, and have them check torque on the bolts, and fine tune the alignment. This should just be part of the deal. I know that the shop that does all of our lifts on our trucks and Jeeps for our dealership will call the customer that bought it and tell them to bring it in after 500 miles so they can check everything. I know a lift and lowering are different things, but the principle is the same.