Fox Aje k member geometry

It places the steering rack in the standard Fox location meaning 94-95 spindles are preferred. With 96+ spindles you’ll have to live with some bumpsteer issues as the tie rod and the tie rod mount on the spindle need to occupy the same space and since that’s impossible you will just have to deal with it.

You cannot correct the bumpsteer geometry with any parts.

96+ mustangs drop the steering rack down about 1” so ford redesigned the spindle mount to account for that by lowering it down 1” as well.

with the 79-95 k-member the rack is 1” higher than the spindles were designed for so the tie rod ends would need to occupy the same real estate as the dropped spindle ends.

Since you can’t physically do that you are stuck with the result.

What really messes things up is when folks add a bumpsteer kit to 96+ spindles thinking that is the solution for correcting the problem. This has nothing to do with the OP's setup and more of a generalization as to what i've seen on the forums and Bookface.

Bear with me for a minute and try to visualize this.

96+ cars lowered the steering rack. On the K-member, and the mount points on the spindles roughly 1" lower than 79-95 k-member/spindles. Let's ignore the Max Motorsports K-member which uses the 96+ lowered steering rack mounts (why they recommend 96+ spindles with their setup). Most guys are going to have a fox style K-member which uses the 1" higher mounting point for the rack.

So higher mounting point for the rack, and lower mounting point on the spindles. You may or may not get bumpsteer depending on how low the car is and other factors (offset rack bushings to drop the rack would help a ton here).

But assuming an impectect setup, the solution would be to raise the mounting points on the spindles or drop the rack. But, often times i see guys add a bumpsteer kit which includes spacers to push the tie rod ends further down, making the problem worse. This is the opposite of what you want to do as you want the tie rod ends higher. I browse over a ton of FB posts where folks say they run 96+ spindles on a stock K-member and added a bumpsteer kit to "fix the problem". 99.9% of people never even measure it because the entire process it a total PITA (i've done it...it sucks).

I'm not saying you can't make it work, but you just need to pick the right parts. If i were doing a stock K-member with 96+ spindles, i would get some offset steering rack bushings and install the rack in the lowest position possible, and then stick with stock tie rod ends to keep the mount point on the spindles as high as possible. You may not even ever notice any bumpsteer at all.

AeroCoupe said:

What about a through bolt bump steer kit and putting the tie rod ends on top of the spindle attachment point?

Click to expand...

I don't know if that can be done. I would think Max Motorsports would have thought of that if that was able to be done safely.

Flipping that around and mounting the tie rod on top? Would need to be mocked up to see what potential interference issues there would be.