I installed dropped spindel disc brakes on the front of my 70 Chevelle Wednesday.

Today when I had it up on a lift I noticed that the outter edge of the LCA's just outside by the ball joint are scraping the disc rotor.

I have not had it aligned yet but it seems the problem will only get worse as the UCA's are moved outward to correct the negitive camber.

What's causing this ? These are part of a disc brake kit from True Connections so it not overseas junk.

Thanks for the help !

Tom

Probably Dropped Spindles and using long "J" hubs!!

The forged spindle drum hubs have a long "J".

The 2-piece and later cast one-piece rotor hubs have short "J" hubs unless I have this backwards?? (It's been a while is all)...........

And "J" is the distance from the wheel mount face to the end of the hub!!

"J" is named after Joe, the guy that found out about this and told the rest of us about it!!

A short "J" increases the wheel track width by like 1.25" or slightly more depending on rim b/s'ing..

So I figure a long "J" move's the rims in closer to the tie-rod ends as well as the A-Arms..

pdq67

Here's a photo of my problem.

The LCA was hitting the disc on the brake and I had to use a cutoff wheel to take off about 3/8 of the tip of it just to allow the car to roll to get it up onto the flatbed.

Any ideas on what would cause the LCA to hit the disc ?

http://www.chevelles.com/showroom/data/500/Post_Pic.jpg

You'll need to grind away the metal on the edge of the lower control arm.

This is a common modification on lifted trucks that use aftermarket spindles.

That's all you need to do. Grind away some of that lip on the LCA.

Before you do that though, what's the condition of that lower ball joint?

I guess I don't understand why installing this dropped spindle would caause the large amount of negative camber.These are supposed to be a stright swap of identical bolt hole patterns on the spindle.

True Connections has offered me new spindles but I would like to know what is causing this before I go to all of the work to replace them again only to have it happen again - plus this time I have to replace the LCA as well.