[H377cat]

Anyone have problems with their car kind of sashaying, especially when you are at highway speed and you step on the gopeddle.

 

[H377cat]

I have a 2016 charger hc. Been through tires, upgraded rear suspension, diff brace,trailing arms ,solid cradle bushings,adjustable upper control arms,it is still wants to wander a bit. Any ideas guys?

 

[DGatzby]

What tires do you have installed? Load rating? @hc797 check this out.

 

[Rockster]

I have a 2016 charger hc. Been through tires, upgraded rear suspension, diff brace,trailing arms ,solid cradle bushings,adjustable upper control arms,it is still wants to wander a bit. Any ideas guys?

Assume the highway speed sufficient that when you step on the gas the rear tires don't break loose? Obviously if they do the rear end can sashay some.

Absent tire spin a bit of sashay (wander/tramlining) comes with the car due its wide tires and of course the road surface plays a role too.

You list some things you've changed. Has there been an alignment done? What do the tires look like? Any signs of abnormal wear which could be due to bad alignment?

Also, tire pressure is important.

And DGatzby brings up a very good point regarding the tires.

 

[baabootoo]

Yes, could the tires be slipping a little? What speed/gear/tires? What pressure you running?

 

[Mattm400]

Wider tires will do it for sure. I got a wide set for mine, 345's on 12" wheels & I feel the same thing although not real bad.

 

[Greengohellcat]

Rear thrust angle check on an alignment machine.
Some guys mentioned that the rear toe was out of spec. There were a few informative threads about this awhile back

 

[DEANGEL]

I get the same feeling with my car sometimes if you're referring to the feeling you get when driving over the metal bridge grating that makes any car feel like it's sashaying side to side.

 

[TrackDay]

Rear thrust angle was my root cause a few years ago.

 

[Fastcar4me]

My 2018 felt better and more predictable on the highway than my 2021. Maybe the wider tires.

 

[SickToo]

When the back of the car is higher than the front it will try to step out more when spinning

 

[Amazi]

mine grabs the cracks in the pavement

 

[DEANGEL]

mine grabs the cracks in the pavement

Always remember: Crack kills.

 

[H377cat]

Always remember: Crack kills.

Thanks guys. I'm running275 20on the front 32psi and 295 20s on the [email protected] both are Michelin allseason tires new .Traveling at 65mph it is a very uncomfortable ride. I owned an rt traded for a scatpack then traded up to a hellcat. As you know they are not the most comfortable cars on the highway but this hellcat drives very different and I'm not one to shy away from power I've had my mopars in the past( 68 340gts,72 340duster)no comparison in horsepower to the hc but I've turned a wrench a time or two. I've never had this kind of problem. I dunno but it's gotta have something to do with the independent rear suspension. That's my guess. Like I said in previous post ,I've replaced the cradle bushings,upper control arms, trailing arms,added a differential brace had the vehicle aligned. Nothing has helped. New tires. Had Michelin summer tires 295 20 on rear thought they might be the problem so I bought the all season Michelins. I'm stumped

 

[VancityCat]

Anyone have problems with their car kind of sashaying, especially when you are at highway speed and you step on the gopeddle.

wide tires and shitty cradle bushings - and shit worn out control arm bushings will do that.

I fixed it by going from 305 to 285 andputting poly cradle bushings and LCA bushinfs

 

[SickToo]

He said already has the hard parts so that leaves alignment or tires. Or worn rod ends or bushings…

Have you got in there with a pry bar to be certain the spindle is stationary?

 

[hc797]

Make sure you have XL Load Rating @ 2149 lbs, that was MY issue!

 

[baabootoo]

Please tell us that it was aligned properly after all the parts????????????

 

[vrwebster]

The Driver continues and will always be the weakest link.