I have the 07 gs350 awd
I just got the 20mm RCA adapters installed.
My suspension is fully oem stock.
No vibrations before the install but once i have them installed the vibration is happening only when it is shifted to Reverse or Drive.
When it is on Park or Neutral there are no vibrations.
It only vibrates when the car is at a stop, when i let go of the brakes the vibration goes away basically when the car is in motion no vibrations.

Note: this was not an issue prior to the RCA adapters.

Am I the only one experiencing this? any info would help.
Thanks in advance.

 

seriously no one else is experiencing this but me?
Even my mechanic was all frustrated about this issue.
We had confirm the vibration is all due to the RCA adapters because he had lifted the car up in the air with the car lift and turn the car on, shifts it in D and R with no vibrations at all. So we left it into D and drop the lift all the way down then the vibration happens immediately.

 

I had them installed professionally at the shop, they tighten the bolts correctly.
Any responses? please help because I like the way the car sits now, it will be a bummer to have to take them off

 

Any updates? I was thinking about buying RCAs in the spring.

 

I'm not positive on the RCA adaptors, but everyone who drops their AWD has vibration issues. Search for lots of threads on this topic...

 

I'm on front 30mm RCA with aftermarket springs and don't have any vibration issue. not sure how that could cause a vibration, unless you need to get it aligned again?

 

Does anyone have RCA blocks 20 mm ...wanted I need 20 mm are where can I get them

 

I need a pair too pls lol