Hey guys, I recently swapped an LS3 into my Cutlass to replace the LY6 that let go on me on boxing day (Merry Christmas right...). The transmission that was matched to the LY6 is a 6L90e, and I am using the same transmission with the LS3 as well.
When I purchased the LS3 I was told it was cammed so I got the ECM with it so that I wouldn't have to worry about messing up the tuning for the engine (my tuning skills are limited). My plan was to delete the VATS, change the transmission tuning since it was a stick shift car and hoped everything would be fine. But... I'm not that lucky. I can't seem to read the vehicle speed therefore my transmission will not shift out of first gear. For the Speedo Calibration section I just copied the settings I had from my original tune which worked perfectly but it doesn't work at all with the new ECM.
I'm hoping someone can help me out in regards to explaining how I should set things so that I can read vehicle speed correctly so my transmission can shift. Attached is the original tune from the LS3 ECM, my altered version for the VATS delete and the transmission tuning and the Tune I had previously to installing the LS3 which was with the LY6 ECM.
This is also my daily driver so any help to get this working asap is greatly appreciated.