My understanding is the Hilux will remain on the old platform for now. I'm sure it's still serving it's customer base perfectly fine. I can't possibly imagine this new TAcoma being used under the same hardcore conditions that the 1 ton Hiluxs are being used in. Also, Hilux truck sales can be measured in the tens of thousands, not the hundreds of thousands that the Tacoma sells, so it's not really worth it for Toyota to redesign it and still meet the needs of the overseas customer. Also, full size American style trucks are not very popular in the overseas markets, hence the Tundra is not sold anywhere but here.

The new Tacoma will be built in Fremont AND in Mexico, exclusively for the U.S. and Canadians market.