At first - after installing BCR coils on my 350awd the ride wasn't bad at all.

Now - after a month or so though, the wobbling between 10-20mph and the car vibrations upon acceleration are really getting old. There's no steering wheel vibration- but I can feel the car itself doing it. It's annoying as hell.

Its not the wheels because there was none of this crap occurring after the wheel install.

Anyone have any solutions? All bolts have been gone back through and torqued to spec and i'm riding at 25.5 all around.

I'm thinking about sending the damn coils back and getting springs. I refuse to drive a $50k car that rides like a Dodge Caravan at times.

 

did you get an alignment yet?

 

Fresh aligment, fresh wheel balance.

 

Weird, but check everything make sure its tight. See if the rings are loose and did you mess with preload?

 

what kind of wobble? side to side when accelerate?

 

known problem with the AWDs. alignment, balances, etc... is not going to fix it. your axles is whats causing the vibrations. im very close to a fix however with the amount of money i already dumped into this problem, im taking a break for a bit before i finish it up sadly

 

If you need a cash contribution to aid in the development of a working solution let me know.

I'd be glad to help in order to clear this up.

 

i appericate the offer but if the solution doesnt work, id feel bad for taking peoples money. im going to give it a shot again in a month or so. check out the AWD suspension thread in the 3GS forum. My solution sorta worked, i just eff'd up the placement of it lol.

 

Dude, sorry to hear that noise/vibrations are still there. The joys of being an AWD pioneer... ugh!

 

I feel like 06's escaped the problem. Atleast mine did with a build date of 12/05

 

whoa, whoa hold the phone....awd's can't be lowered without some sort of wobble? does this go for all awd lexus'?

 

Unfortunately, yes. There is a very small % of people that do not suffer from the shakes and wobbles

 

yep. at the moment most people with a GS or IS that are lowered have a wobble between 10-20mph acceleration and sometimes at higher speeds. I'm lowered on f-sports and it vibrates. Sometimes it happens, sometimes it doesn't. It seems to be caused by the axles being driven at an extreme angle. In fact when you have it at about 25" off the ground from the fender, you're axles are at about -11 to -14 degrees so that's most likely the cause of it. But if you raise the car and keep the axles straight, it won't cause a problem.

 

it sucks - im one of the many people getting these noises. some vibrations but seems like it went away

 

lol.. wait til you start tearing CV Boots!! Thats another adventure in itself!! I've had to replace 2 already!