What is a Shift plug?

[Lynnetteb2000]

I'm looking to buy another Ford truck.

One that I'm looking at, the seller told me that the shift plug needs to be replaced. At wrecking yard it's only $15. Also said it makes it shift smoothly.
What the H@&/ is a "shift plug"?!

[Raptor05121]

I don't think he knows what he is talking about, I've never heard of that

[RhinoZ24]

If the professor doesn't know what it is, then it doesn't exist lol.

[Jersey_Joe]

I've never heard of it either

[Jersey_Joe]

Seriously. Wtf is a shift plug. Lol. I must google later

[BFEB]

My guess is its what the seller calls a synchronizer, but your guess is as good as mine at this point.