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Message: [QUOTE="TD-5, post: 1074968, member: 12311"] This really doesn't help, but over a year ago when I was trying to modify the shift points in the S1L schedule, I e-mailed H&S with several questions. One was concerning the shift points. They said then that the Ford programming used "Floating point representation" & that the numbers represented what the TCM was actually seeing. Here is what I asked & the answers I recieved: [I][I]1)The shift point parameters use a % throttle position axis. I understand there are 10 positions representing 0 to 100% throttle. These positions are given numbers ranging from 0 to 1020. What do these numbers represent? 2)What exactly is "Hot Mode" 3)Under the Torque heading, Curves; there are Several torque management items; what is the Torque truncation switch? 4) Under torque converter, Values ;there are two parameters that use the term "Minimum Speed ratio" what ratio are they referring to? [/I[/I] [I]The 0-1020 values represent 0-100 percent throttle. They are not scaled correctly because the TCM uses floating point data representation for those values. We cannot currently manipulate floating point values with our MCC software, so they are seen exactly as the TCM sees them. Hot mode is a different torque converter scheduling used when the TCM thinks the trans fluid is too hot. Locking the converter earlier saves lots of heat buildup. Mcc allows adjustment of when to enter and exit hot mode as well as the torque converter lock during hot mode. Torque truncation is just one way for the TCM to manage engine output torque. Minimum speed ratios are used to limit converter lockup. It is a ratio of engine speed to transmission input shaft speed. Pretty much saying if the torque converter is losing too much rpm, don't lock the converter. [/I] I ain't no computer programmer so the floating point representation was/is over my head. I tried looking up the meaning & it only confused me more! [url]http://en.wikipedia.org/wiki/Floating_point[/url]. After a lot of trial & error I did get my shift points pretty well where I wanted them, with some help from another fellow from the H&S forum. Another thing I have noticed is all the shift points & converter lock up points in the earlier versions of MCC where in MPH, but since MCC has been updated they have changed the MPH to OSS( output shaft speed) for all the shift points ,yet the converter lock points are still in MPH. Possibly.... this is simply so users don't associate the shift point figures with actual(real) MPH shifts. MCC is such a great programming tool, but unfortunately there is no user manual & everything for the general user is by trial & error. This can be very dangerous & expensive...... Most likely this is why H&S won't offer any advice as they don't want to be liable for us blowing up our trucks![/I] [/QUOTE]