Post Shock/Strut rocking back and forth when braking
 

:confused:I've noticed that the car tends to rock back and forth when braking and its becoming annoying after replacing the shocks and strut (also replaced some of the suspension links).

Anyone ever see this before? I went from factory sls/edc to bilstein/eibach shocks/struts/springs!!!

Hmm, well if anything, it should be firmer after switching from SLS/EDC to springs and shocks.

The only thing I can think of is the Eibach springs are softer than the H&R counter parts.

did you change the rear arms on the front? the ones with the big bushing in them????
when i had this problem when i came to a stop and released the brake those were the arms i had to replace

I have replaced the bushing in rear arms on the front for both sides. I noticed the rocking after I replaced the front struts so I'm thinking maybe its the front strut arms. Now that I think about it I think I saw a video on E38.og where the guy showed the tire going back and forth which would make it feel like the car rocking back and forth.... I'm going to look into this .... the car has only 126k seems a bit early but who knows.... its a heavy car.

Check that the strut nut in the strut tower didnt get undone a bit.

They are extremely heavy and IMO the suspension links wear out really fast. My outer tie rods and the center control arms died at 88K and trust me i drive her real careful. My friend whos garage i use to work on my car said they wore out faster due to the low profile tires and rims. Apparantly its harder on the whole suspension system. Anyways i had the similar rocking thing due to the center control arm (large busshing). I changed the whole front end suspension links....noticed the steering felt tighter as well. Id suggest doing a front end rebuild and tighten all the nuts to factory specs...that has to be done when the car is on the ground and not suspended. I believe its 75Nm for the centre arm.

This is true. Bigger wheels and lowering will always add more stress to the rest of the suspension components. That is why I did a COMPLETE suspension upgrade. Now the suspension is very tight and solid.

Upgrade? u mean not OEM? i went with OEM when i rebuild mine...i changed everything even the cetre tie rod :P

yeah, upgrade as in to new OEM :D