I have a 2019 Kenworth T680 with a TX-12 automated transmission. Does anyone here know what it would cost to take out the automatic and put a 13 speed in? Or is it even worth it?
Depending on what is still remaining as far as brackets, hangers, templates(knockouts) in the firewall & floor for all that is needed for a manual transmission. As years go by, more and more cabs are designed for strictly auto.
Dealing with the ECM may also be an obstacle. I gotcha on the auto, hate them myself.
When i did the transmision swap in my 579 it was $18,000 all in. And that was for a pretty simple like for like with very minor modifications.
With your being an auto and needing the harness, holes cut, holes drilled, brackets mounted, any changes to the drive shaft and flywheel ect. Id guess add a good 50%-75% to that and you would be in the ballpark.