calling LS swaped guys

[Shon]

Well, what trans will you be using? If its an electronic trans (4l60e or 4l80e) the trans is controlled by the PCM, ie its shift points and pressure. And the PCM is fed information from the trans based on sensors and tells it mainly the speed, that is what controls alot of the trans tables, at WOT there is a RPM driver too. but for low speed the PCM controls the shift points. this is no big deal as long as you have the correct harness and 12v to the E pin at the big plug on the trans.

But then you want to know how fast you are going right!? Well, you can run an electronic speedo that will be run off the Vehicle Speed Sensor (VSS) or you can take that signal to the 'box' that turns a motor that turns a mechanical speedo (ie the stock one in my case).

IF you are running a TH350 or TH400 or other non electronic controlled auto then you do not need to worry if you are using a mechanical speedo, you just run the cable(stock) to the speedo as normal.