John Jensen
Well-Known Member
- Mar 22, 2016
- 944
- 486
- Truck Year
- 2016
Here's the size of my usr files
Stock OEM ECM tune file is 130,357
SFT all in one (ECM & TCM) incl Rally tunes file is 1,605,047
Once you upload the OEM tunes and send them to SFT you do nothing until you receive the SFT usr file. Then you upload the SFT usr file onto the handheld. Then you use the handheld to download the SFT file to the ECM & TCM. It's an all in one file so you just let the handheld do its thing. I may have used the download and upload terms incorrectly.
Hope this helps
Stock OEM ECM tune file is 130,357
SFT all in one (ECM & TCM) incl Rally tunes file is 1,605,047
Once you upload the OEM tunes and send them to SFT you do nothing until you receive the SFT usr file. Then you upload the SFT usr file onto the handheld. Then you use the handheld to download the SFT file to the ECM & TCM. It's an all in one file so you just let the handheld do its thing. I may have used the download and upload terms incorrectly.
Hope this helps