Steering is "squirmy" under heavy braking
#1
Pole Position
Thread Starter
Steering is "squirmy" under heavy braking
Hello All,
I've owned my IS F for a little over two weeks now, and I have noticed under several occasions under heavy breaking (close to 70-80% breaking capacity) that I have to fight the steering wheel to keep the car tracking straight. This is anywhere from speeds of 80-90 mph coming down to 40-50 mph. Could this be an issue related to the front control arm bushings? My F only has ~41,xxx miles and tires are brand new (OEM Spec) Continental ExtremeContact DWS. No other alignment issues known as the car doesn't track left or right either.
All insights are appreciated, and I am extremely happy to be apart of this community!
Regards,
Sameer
I've owned my IS F for a little over two weeks now, and I have noticed under several occasions under heavy breaking (close to 70-80% breaking capacity) that I have to fight the steering wheel to keep the car tracking straight. This is anywhere from speeds of 80-90 mph coming down to 40-50 mph. Could this be an issue related to the front control arm bushings? My F only has ~41,xxx miles and tires are brand new (OEM Spec) Continental ExtremeContact DWS. No other alignment issues known as the car doesn't track left or right either.
All insights are appreciated, and I am extremely happy to be apart of this community!
Regards,
Sameer
Last edited by Sameer89; 04-04-16 at 01:24 PM. Reason: Updated post.
#2
Racer
iTrader: (4)
I had an issue when I switched to continental DWs (the summer only tire). With me, the car seemed to float (as if getting hit with cross wind). I had to make constant adjustments - this happened under acceleration and deceleration (not while cruising). After upgrading the LCA bushings and getting 3 alignments in a span of 1 month, it turned out to be a bad tire. One of my rear tires had something called radial pull - tire was replaced and the problem is 100% gone.
With that said - I would start by paying close attention to see if the issue is really only under braking. If it is, I would start with an alignment.
With that said - I would start by paying close attention to see if the issue is really only under braking. If it is, I would start with an alignment.
#3
Lead Lap
iTrader: (1)
Hello All,
I've owned my IS F for a little over two weeks now, and I have noticed under several occasions under heavy breaking (close to 70-80% breaking capacity) that I have to fight the steering wheel to keep the car tracking straight. This is anywhere from speeds of 80-90 mph coming down to 40-50 mph. Could this be an issue related to the front control arm bushings? My F only has ~41,xxx miles and tires are brand new (OEM Spec) Continental ExtremeContact DWS. No other alignment issues known as the car doesn't track left or right either.
All insights are appreciated, and I am extremely happy to be apart of this community!
Regards,
Sameer
I've owned my IS F for a little over two weeks now, and I have noticed under several occasions under heavy breaking (close to 70-80% breaking capacity) that I have to fight the steering wheel to keep the car tracking straight. This is anywhere from speeds of 80-90 mph coming down to 40-50 mph. Could this be an issue related to the front control arm bushings? My F only has ~41,xxx miles and tires are brand new (OEM Spec) Continental ExtremeContact DWS. No other alignment issues known as the car doesn't track left or right either.
All insights are appreciated, and I am extremely happy to be apart of this community!
Regards,
Sameer
#7
Pole Position
https://www.clublexus.com/forums/is-...rr-racing.html
Hands down the best mod you can do for your F for the Braking and Steering feel bar none!
Hands down the best mod you can do for your F for the Braking and Steering feel bar none!
Trending Topics
#9
Racer
Yup as others have said LCA bushing will sort this out, I had the same issue and now zero deflection under heavy braking
#10
Tech Info Resource
iTrader: (2)
Everyone has their own preference for which vendor's product, but all of them will solve the problem you have. It is without any doubt the front lower control arm bushing causing this. Replacing it with something harder will make the wandering feeling go away.
#11
^^^^^^^ as said above. LCA bushings.
You have two options. RRracing or Figs.
I have RRracing and love them.
http://www.rr-racing.com/Lexus-Lower...isfxlca001.htm
You have two options. RRracing or Figs.
I have RRracing and love them.
http://www.rr-racing.com/Lexus-Lower...isfxlca001.htm
#12
^^^^^^^ as said above. LCA bushings.
You have two options. RRracing or Figs.
I have RRracing and love them.
http://www.rr-racing.com/Lexus-Lower...isfxlca001.htm
You have two options. RRracing or Figs.
I have RRracing and love them.
http://www.rr-racing.com/Lexus-Lower...isfxlca001.htm
I'll add a 3rd option, which I have and love, RCF oem bushings. The improvement in braking and steering was immediately noticeable. I don't track my car so I figured these were more than sufficient. From time to time I do think about pressing in FIGS into the extra brackets just to compare.
Last edited by BuLLdAwG; 04-05-16 at 04:19 PM.
#13
I thought i put my breaks on wrong and one side was grabbing harder then the other. Glad im not that only one who had this issue, and even more glad that there is a pretty simple solution.
#14
Pole Position
Thread Starter
I'll add a 3rd option, which I have and love, RCF oem bushings. The improvement in braking and steering was immediately noticeable. I don't track my car so I figured these were more than sufficient. From time to time I do think about pressing in FIGS into the extra brackets just to compare.
#15
Someone else on the boards did try. I would credit them for me trying, but I don't remember who it was!
I ordered off mylparts.com under rcf. They are approx. $50 each after discount. I have no doubt the steering would be even stiffer with the FIGS or RR product. Maybe one day when this feels normal!
Edit: Jeff Lange was the person who I originally found that used RCF bushings.
Http://www.clublexus.com/forums/susp...duro-hp-9.html
I ordered off mylparts.com under rcf. They are approx. $50 each after discount. I have no doubt the steering would be even stiffer with the FIGS or RR product. Maybe one day when this feels normal!
Edit: Jeff Lange was the person who I originally found that used RCF bushings.
Http://www.clublexus.com/forums/susp...duro-hp-9.html
Last edited by BuLLdAwG; 04-06-16 at 08:33 PM.