BNSF Racetrack - Chicago to Aurora

Quick question folks… I grew up in an area near Western Springs and used to ride/watch the Racetrack growing up. Still remember those green E8/9’s howling downtown.

My question is: Did METRA go straight from the E8/9’s to the F40PH-2’s? Or… did they run the F40PH’s for awhile before the -2’s?

Any help would be appreciated!

Thanks,

Jeff