Hello I am new to this site and I need some help with a TBI swap I am planning. I have a 454TBI engine and 4L80E transmissio from a 1991 v2500 Suburban. I have all the wiring and the ecm which is 16147060. I have done efi swaps on fords so I am familiar with wiring and fuel system setups. My question is the 4l80e transmission i have was slipping between 1st and 2nd gears so i was wondering if i could use a 4l60e transmission in place of the 4l80e. I realize this is a lighter duty transmission but in my application that will not matter. will this ecm work with the 4l60e or is there a different pcm I could use. I have found a lot of excellent information on this site and I would appreciate any suggestions you cold offer. Thanks