Topic: Castle nut?

[ChrisV289]

I forget, which castle nut goes to the bottom and top control arm where it holds the spindle. I forgot to mark them when I took them off

[jwc66k]

Did you look in the library? Under topic "Mustang Hardware Spreadsheet,64-66" in the by application section, you will find your answer. (Hint, it's "Ball Joint" related.)
To further confuse the issue, or add clarity - try the topic "Hardware By Size/Dimension -". You need to know what the size of the nut you are looking for?
Jim

[ChrisV289]

I'm in the garage working on the car on my iPhone. Thought this would be faster than trying to look at the spreadsheet. Can you just please give me the answer so I don't have to waste time going back in the house

[CharlesTurner]

The tall one is for the upper/lower ball joints.  Shorter is usually for the idler arm.

[ChrisV289]

Interesting because I have two of each and all four came off the ball joints when I took it apart a few months ago. I haven't messed with the idler arm at all.

[Bob Gaines]

Interesting because I have two of each and all four came off the ball joints when I took it apart a few months ago. I haven't messed with the idler arm at all.

Some of the after market ball joints require a shorter castle nut for the cotter pin to line up properly . The shorter nut on a stock ball joint will have the cotter pin opening far enough above the castle turrets that it defeats the purpose of the castle nut. I don't know if  this is your reason but this a common circumstance that I have seen.