4L60E electric shift controler???

[original balzer]

I cant seam to find it but didnt someone on here do some sort of electronic shift controller? seams it had a 3 way switch and had 3 levels. like stock performance and towing??

Also I would like to know what the best ideas for a keeping a stock trans happy. Do any of you sugest any kind of additives or synthetic fluid?(can you do that once its had regualr fluid?)

I will probably add a bigger trans cooler and a trans temp gauge.

As some of you know I just bought a 99 yukon (yet to take delivery) it has 116k miles on it and I would like to keep it alive as long as possible. although I do have another one in a 94 with only about 2000 miles since rebuild.

 

[78gmc]

b&m makes the shift controller you can get them at summit racing
it already somes with a trans cooler i'd just leave it alone. the problem most people have is towing a trailer in over drive. thats the weakest gear thats y they break.