looking for a ls1 tune with 4wd select input

[sideshow]

hi all I have to try find a solution for a ls1 engine and 4l60 into a 4wd transfer case

the problem I have is the customer made his own transfer to 4l60 adapter so there is no provision for a outputshaft speed sensor

the transfer case is a Toyota based unit and it does have a 3 wire square wave sensor on the output of the transfer case

now the problem is I can use this sensor and mod the signal to go into the ls1 pcm so the 4l60 gets correct speed using a speedo module
but when the customer selects low range in the transfer case this will put the speed into all wrong and therefor make the box change gears all wrong

is there any usa based 4wd ls1 tunes that has a 4wd select input which when u earth this wire it then changes to a different speed map

I know I can do this using 2 speedo modules and sit down and calibrate both of these one at a time but im trying to get this sorted with minimal amount of modules
and wiring so I can keep it reliable

thanks

[BADWOLF]

Is this what your looking for..?
02 Silverado 4x4 4l60