Thanks for your description, makes perfect sense now... So all 3 bushings, which SPL makes the solid ones discussed in this thread are the ones you can see in my pics.

There are then 4 bushings for the subframe, or (rear crossmember another name for it?) that I cannot see, but are between it and the chassis?

I had an alignment done after both my wrecks, and several parts were replaced, front lower control arms (shock mounts), endlinks, swaybar bushings. So those bushings should be good. Only ones left are the front-rear control arm bushing, not sure what its called but its the curved arm which I think has its own balljoint, and the upper a-arm which would need new bushings. But all the rear bushings have never been replaced, so maybe I should go for a full rear set, including diff and subframe bushings, and just a few for the front. That, coupled with shocks (Tokico HP blues) and a alignment should make a big difference. $1,200 or so later right?... I could do a fair bit of these myself but i'm tempted to pay a shop to do it. Either way this is a lot more money than I was planning on spending but I do have it, just didn't want to put it all in suspension.

Now what about springs? Could they be weak after so many miles or do they not really go bad in this short of time?

Now when I said my car feels wobbly, that isn't under power, so would toe really affect it that much still? I would think bushings and shocks would affect this most when just driving normally in a straight line. But when cornering hard and applying power, all these components really come into play.

 

We are going to stop offering the rear bushing by itself soon -- it is not good to allow the front of the differential to "bounce around" on rubber bushings while keeping the rear of the diff fixed.

The solid differential bushings significantly reduce wheel hop, which makes a very noticeable difference, particularly for those who drag race, drift or road race.

 

has there been any talk about a subframe collar set like available for the 240's?

such as these http://www.evasivemotorsports.com/Me...&Store_Code=EM

 

We have something in development

 

that is a neat idea, I guess.

 

Ikeya formula has had these for our cars for several years now.
http://www.ikeya-f.co.jp/en/car_type...-mls-al-e.html

 

oh so you guys can get them? pm me a price shipped to 77064

 

here is my poor attempt at illustrating all the mounting points and bushings that we have talked about. I don't think I messed anything up.



here is a link to the larger item.

 

Pics like that are very helpful to alot of people...nice. - Also reduces the noob questions.

 

Kuah, could you comment on combining the SPL rear solid diff bushing with the Whiteline front diff bushing caps. I've seen it mentioned as an option and am curious what the negatives would be. I think the only benefit would be the expectation of less noise with the whiteline front caps.

 

We are going to stop offering the solid rear diff bushing by itself... basically you don't really want the nose of the differential to "bounce around" while trying to keep the rear fixed, over an extended period of time that could fatigue the rear diff housing/stud.

I don't see having a soft bushing in front would change the level of noise being transmitted, there is still a metal to metal path for the noise from the diff to the subframe. While we do have to warn customers that there will be an increase in noise, it is really not that bad because the entire subframe and diff assembly is still isolated from the chassis through the 4 big subframe bushings. We've been offering this for several years now and I've never had a complaint about noise from our solid diff bushings; in fact a number of customers have come back to say that it wasn't really as noticeable as they thought it would be

 

I think I commented in this thread on the increased NVH from the front diff bushings, namely that there is basically no increase.

 

Thanks guys

Yep, I think you have too Motormouth. I've seen posts saying NVH is not noticable and other posts saying NVH is terrible.

Kuah's comments about eventual fatigue with a soft front bushing and pointing out that once you put the rear one in, you've already got metal-to-metal contact tells me there's really no point to considering the caps.

 

The primary difference between the SPL front solids and the Whiteline "caps" is a labor difference, and cost of the item in the first place.

The SPL will give a more direct feel, being solid
The SPL requires you to press the old ones out

The Whitelines are less expensive, and much quicker/easier to install since no pressing is involved, however they will not be as direct as the SPL

 

I don't think the front SPL bushings needed to be pressed in. but I could be wrong.

 

you're right, edited my post - I keep forgetting they are divided in halves

 

You rock Motormouth thanks for that pic! Actually your verbal description worked for me but the pic is great for those of us learning this stuff.

Almost think we should make a new thread and sticky it, this is overall good info to have at your fingertips.

 

See, I AM more than just a giant dick. lol.

thanks for the props greg, glad my info was useful.

 

I heard "giant dick" and came running ... oh ... wait ...

 

i think a sticky on the weak points of our suspension would be great. also would be nice to see the steering rack addressed since even NISSAN upgraded it for the 370Z http://www.370z.com/MagazineArticles...uspension.aspx