is350 feels unsafe to drive specially on the highway. feel like i cant keep car centered in lane.
recently got a alignment done and feels the same.

 

1. is350 is power happy and it has "lsd" so be safe
2. how old are your tires? are they the same all around ?
3. adjust your driving position, it will help - seriously.
4. on your alignment sheet ? was the alignment done for an AWD version of IS ? if that's the case you need to re-align with the right model.

best of luck!

 

You may want to read some older threads first

https://www.clublexus.com/forums/is-...gh-speeds.html

 

Worn rounded tires coupled with ruts comes to mind as the tires edge wants to climb out of the rut. And the wider the tire, coupled with more rounded outer edge, the worse it gets making for darty like behavior.

What tires and how many miles on them? Does your alignment sheet show "Toed Out" As Left values?
If so, this will make the condition worse.

Place your car out of the ruts. Up on the high side of the bubble and post up the alignment sheet.

Maybe you wore out the LCA's which would make the car a pain to drive. Twitchy comes to mind...

 

2ND gen IS "DOES NOT" has LSD

 

is350 does

 

The 2nd gen is350 only has (e)lsd = electronic lsd were the brakes are used to simulate the
effects of a lsd differential. This is far different than an actual lsd differential.

 

Like $2,200 different than eLSD according to a recent invoice! lol -sigh-

 

Post a picture of your alignment results and advise us on your tire conditions.

 

I believe the 2010-2011 IS F has LSD. Real LSD

 

Also check LCA bushings. May need stiffer bushings like I did. I changed to RCF LCA bushings.

 

here is the alignment sheet . have new rears and still have tread up front

 

 

car fells like its fighting which direction to go in. either left or right

 

Do you have any underbraces on the car up front? After market suspension braces on the chassis?

I had a bar under brace it would make the car pull all over the road. Especially on uneven roads. On the freeway it would pull lightly depending on the surface too.

Took it off and it went away. I guess the chassis does need some flexibility. To much stiffness is only for track cars.