Stock Links....? Any lowering changes geometry, add coilovers and it shortens the life of the Links. Remove and replace, note the silence....Really.

RUD

 

i will take a look again, but they are the metal end links and are in good shape. I think it is the top mount of the spring. In doing my research I have found others with the same problem. I am begining to think I just got a bad set in the rear.

I have another call out to Pfadt so we shall see where this goes.....

 

keep us posted, looking into COs soon

 

You can read up in the suspension section here for some known issues of the pfadt setup and how to fix them. i love the product but it wasn't without some growing pains and solutions to be had. Trust me its fixable!

http://forums.corvetteforum.com/auto...e-learned.html

Do you have the Pfadt sways / Stock Sways? Have you pulled the pillow blocks off the bars and greased the sh-t outa them lately? Even after greasing the bushings, if it cant hand twist when the car is NOT under load than you got a problem. Check to see if the bushings are binding the bar up. i also have the "version 1" bar and on my setup I found a slight binding even after greasing, i put a small washer beteen the C clamp and the chasis making the pillow block compress less and instant sway bar nirvana. i think this was addressed in the new version 3 bars. Also which "holes" are you using on your pfadt sways? total stiff? half way? all soft? the stiffer you get the better the track performance, but the more rigid the suspension for the track. Not so pothole street friendly, and much less quiet ibso facto.

Also check your pre-load on the coils. I find that too many people in the attempt to get the exact height they want fail to see if the coil has any preload on it. The coil should be atleast mildly compressed in setting the height. I solved the "clacking" problem on a friends car once by just preloading the rear coils about 4 more turns. No preload allows the spring to move around more. You will get shift click from the springs.

I also have the "version 1" and had to change to the new style mount. Did you get the paperwork on the NEW set up lengths? far different than the old clevis mounts. Its a bit tricky to convert and get the lengths set up correctly. I had to mess with some washers up top to get it just right to their specs. ECS actually had a contact at Pfadt and they got the fax over for me of the exact upper and lower starting lengths to set it up with. Needed a caliper to set it up right. Saved me some trouble shooting of my own in the conversion over. Happy I did the Clevis mounts were noisy as all hell, the new ones are now quiet as a sleeping baby.

Lastly what are your dampner settings on the open road? if you are 16 / 16 on a bumpy road, you will take a beating on the suspension and in the car. Soften up the front and rear a bit and you will notice the irregularities on the street will melt away and the bump steer in the rear from a leaf spring instantly gone.

Lastly have you checked out the bushings? The OEM bushings will fail overtime and i have even seen them push completely out of the control arms. Most common = upper fronts. This can create movement in the CA and cause metal to metal contact of the CA on the frame attachments. FYI changing bushings is a PITA, but makes a HUGE performance difference and your camber etc will hold perfect after. Poly is the way to go, and Pfadt will help you get a set up which also allows for a lot more camber. Can be challenging to get them in though and set up right.

Love my pfadt set up, but with all after market products there are some growing pains. OEM works easy and quiet but doesnt always perform to the max we need. Don't throw out the baby with the bath water! Don't chuck your Pfadt stuff, OEM simple can't do what theirs does, you will solve it with these steps above! Remember though performance parts will always be a bit nosier than OEM which compromises quiet for performance!

 

lol....if it was a little noiser over the stock set that would be fine. This sounds like something is falling off the car. Also, it doesnt take a potshole to make the noise, hell I can reproduce the should backing off the 1in threshold in my garage.

I do have plenty of pretension

Set on 10 in the rear (8 up front).

Mine came with the new mounts so I just followed the instructions.

I put new poly sway bushings on and greesed the hell out of them already. (stock sway bar)

A Arm bushings look fine.

I spoke to pfadt, Im going to disconnect my end links from CA and take a trip around the block. IF the noise is still there, im sending them back to be looked at.

We will get it figured out.

 

Pretension is not the settings, its the two collars you tighten with the special coil over wrench. The adjusters you do for the 1 - 16 setting is dampening :-) Affects the rebound stiffness.

You can also try turning the coils. I know a guy who had a similar issue on a different brand of coil over. Since its a spring the tip of the spring was hitting something. He rotated the spring 180 degrees (its a tuner car guy) and the noise instantly went away.

Good luck! hope it works out. Pfadt is pretty great about support when a product has issues, and they always make it right.

 

Special wrench? I didn't get a wrench, much less an allen wrench to adjust the top nut when I had my pfadt's installed at MTI last fall.

 

Kit comes w/ 2 different size spanner wrenches & an allen wrench for top of shocks.

 

I guess MTI felt the need to keep these for themselves.

 

You can buy those at almost any speed shop or tuner shop if you dont want to drive back to MTI or just order another set form pfadt. they are a generic size. it allows you to tighten the 2 collars that SQUEEZE the spring. Since you didnt know about this, im guessing more that this might be your problem like I first guessed. If one of the rings loosened up the large coil spring will slide around and can sound awful. It can also affect adversely your ride height.

Try this first before you send anything back

 

Thanks but I'm not the op for this post. My coilovers are just fine!