Soarer 1UZ auto trans problems, ideas?

[Rassell21 0]

Looking at buying a 92 v8 soarer, its got issues with the gearbox, when its cold it works fine selects gears etc, but once it was up you have to rev the shit out of it to get it to move, and no reverse at all, could it be something simple or would it be cheaper and less effort to just purchase a gearbox ive found for about $500,

[Rassell21 0]

Once it warms up*

 

Zany phone