GS300 AWD curb weight/dist. = 3760lbs. 55%F 45%R
GS300 RWD curb weight/dist. = 3536lbs. 53%F 47%R
GS430 RWD curb weight/dist. = 3745 lbs. 54%F 46%R
RWD turning diameter = 34.1
AWD turning diameter = 35.4
RWD ground clearance/Height = 5.1/56.1
AWD ground clearance/Height = 5.5/56.5

From the numbers above it seems as if the AWD is very similar to the GS430 in respect to curb weight and weight distribution (Front +45.7lbs., Rear -30.7lbs.). The AWD turning diameter is larger and sits higher than the RWD. I spoke with a master tech at Coliseum Lexus of Oakland and he indicated the AWD should have a stiffer damper compared to the RWD's (not sure for 300 vs. 430). Also, suspension design differs from the RWD versus AWD because of a drive shaft going to each of the front wheels (links). I havn't measured or physically compared the actual springs but I believe the only difference in the springs among thecars are spring rates (O.D. should be similar). Basically, if I were to be impatient and install GS430 spec'd lowering springs in my AWD do you guys think I'd run into any issues? I want to install larger wheels/tires and lower the car a little bit (close the gaps).

Also, for those who really want to lower their AWD right now (with springs spec'd for the AWD) it seems we're all out of luck. After performing extensive research and speaking with representatives from Tanabe and Eibach it seems that Eibach is in development to hopefully release lowering springs for the AWD by March. No response yet from Tein or H&R. This process can go faster if any SoCal AWD owners wants lowering springs (http://eibach.com/cgi-bin/htmlos.exe...62434700022430). If I was in SoCal I would do it.

 

Good post.
I want to lower mine also and was wondering the same thing about the 300/430 springs.If Eibach will have springs in March,I'll wait.The 4X4 stance might help in my snow coverd area.

 

I'm not sure if you've been contacting manufacturers but they could be just saying they're going to come out with springs by March, it might not happen. They need to have a good enough demand to make the GS300AWD lowering springs. Also, Tein has a Luxury lowering spring in which it lowers a 300/430 only approx. .8" in the front and .5 in the back. The ride is suppose to be really smooth. I'll reply with the spec's.