Im looking at a 16v 5 speed tracker. In order to put a automatic transmission in it, I would need to switch wireing harness  from a 16v with a auto trany correct?

4 speed O/D trans, yes, 3 speed no

Wild

ok. thanks for the fast response. How hard is it to find a 4 speed

Most 4 doors and most 2 doors later than 95 have them, earlier like 89-93/94
are mostly 3 speed autos, which are made by GM and say so on the driver side
of the trans, the 4 speeds are made by Aisin (sp) who is an OEM Toyota supplier

ok. thanks again. 

if you want to go through all that pain you should be able to get a 4 speed A/T for next to nothing. out here there dime-a-dozen

Most 4 doors and most 2 doors later than 95 have them, earlier like 89-93/94
are mostly 3 speed autos, which are made by GM and say so on the driver side
of the trans, the 4 speeds are made by Aisin (sp) who is an OEM Toyota supplier

4 speeds are only in 4 doors (except for the x90).
3 speeds are only in 2 doors (except for the x90).
x90s have 4 speeds.