A custom tuned SCT will crush anything else you've tried. And the transmission will last LONGER with an SCT on there than with anything else. The SCT is one of the only ones that can actually access the TCM on the tranny and program it accordingly. Despite what the box of the others say, they can not do this.

A stock 5R110 will hold up to whatever tune you can load on the SCT and then some. The key to making it last is choosing someone who knows how to write good tunes. The common suggestions will be Eric @ Innovative Diesel (who i use), Matt @ gearhead, Doug @ GoGo, Vivian @ quicktrickautomotive. There are others, but these are the most popular and your best bet.

 

I agree with Mdub707 on this. Eric @ Innovative Diesel is who I use also for custom tunes.

 

Me too!