Quote from burningrubber on April 30, 2020, 9:09 am

So I just discovered in the text it for the LS instructions on page 17 it says

"The Ultimate LS ECU has the ability to control the shift point, shift firmness, when to downshift properly, and all other features involved when controlling the transmissionThis feature is suitable for 4L60, 4L65, 4L80 or 4L85 GM transmissions. This feature can be purchased with the kit or as an addition at a later time"

So I was wanting to add a overdrive transmission to my current ride and found the part number for the trans harness is 70050-5.

Can anyone confirm that all I need to convert my 70050 to use transmission control is this harness? (and resetting the configuration in with the handheld of course)

Thanks guys I tried searching but haven't found this question before.