Steering shaft diameter

This is what I was trying to understand.

Were you talking about the steering column steering shaft (blue)

Or the steering gear input shaft. (Yellow)

I'm doing the reverse to you.

I'm replacing my power steering with manual steering.

I have a column shift manual column and the PS console shift column

I'm going to swap the steering shaft from one column to the other.

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I'm not sure but I think the blue. I'm just looking into it at this time. Thanks for the reply.