I have searched here and looked online and can't find any real good information. I want a programmer for just the transmission, don't need anymore power and I only want to program the tow/haul mode, can you do this with box programmers or will I need to get a custom tune?

 

You will need to get a custom tune for just transmission programming...I can offer this for you, just send me a PM or email and I will be glad to help...thanks!