1 old business. 1 new business. 1 vehicle

I have a rental property that I used a truck 100% for and it's fully depreciated.

I started a new business last year (schedule c) and used that truck for this new business as well as the old business.

I plan to sell the rental properties this year.

How do I do taxes so that the truck is added to my new business and fully depreciated?

And then when I sell my rental properties this year, how do I keep the truck and use it 100% for my new business but not have to recapture tax? (Because I'm using it 100% for business this whole time.)