Lower Control Arms Touching Brake Rotor

[jtwoods4]

Arrrrrgggggg

Well after several weekends working on my 69 GTO (A-Body) I finally have the car back on the ground.

Installed the SC&C Suspension Kit:
SPC Upper Control arms
Howe tall ball joints
SPC Lowering Springs
Kept my stock spindles
Kept my stock Lower Control arms

Tonight I started adjusting the camber and noticed that the lower control arm is touching the brake rotor. As part of the SPC Installation instructions the disc brake splash guard has to be cut away on the bottom so the lower control arms has clearance. However, my lower control arm needs even more clearance. It is slammed into the brake rotor.

Any help would be appreciated. Is there some sort of shim I can put behind the rotor to push it
out about a 1/4 inch? Any ideas? Anyone experience this?



-JW

[68400BIRD]

I would start with a call to Mark. Putting shims behind the rotor would affect the position of the caliper.

[jtwoods4]

Ok, I have a solution. After talking with Ramey at UMI and Mark at SC&C we narrowed down the issue.

Mark has seen this same issue on a few of the 69 A-Body's. Turns out that GM had several different vendors that stamped the lower control arms. One of the vendors stampings was about 1/8 inch longer at the very tip of the ball joint pocket.

The solution is to reform the tip of the lower control arm with a 4 pound hammer and light taps, so not to damage the control arm.

Apparently after market brake kits from Baer and Wilwood do not have this issue. After market control arms are also a solution.

I am going out to the garage now to reform the control arm......

-----------------------
Ok guys here is a detailed video showing how to make the modification to the lower control arm. Thanks again for the help.

(EDIT... THE CORRECT VIDEO LINK IS BELOW)

http://www.youtube.com/watch?v=9jsMF...=youtube_gdata

[BonzoHansen]

did mark say do that? that part of the LCA is where i've seen stress cracks and such.

[jtwoods4]

did mark say do that? that part of the LCA is where i've seen stress cracks and such.

Yes that is exactly what Mark said to do. I will probably end up getting the UMI ower control arms in a few months. But until then this is how you do it with stock control arms.

[Quickboat]

You are just lucky that is all you had to do. It usually cost more $$$$$$.

[jtwoods4]

Yeah, pro touring conversions are definately not cheap!