transmission temperature

I am planning on upgrading my OEM radiator with the Mishimoto Performance Aluminum radiator. Has anyone done this upgrade yet? It seems that this is a fairly new product so there aren’t too many reviews on it as of yet. Worth mentioning that my OEM radiator is doing just fine yet. I live in...

So my commute was recently cut down to 1.5 miles. I'm now a hop and a skip from work. The drive is long enough for my engine to get warmed up to proper temps but not long enough for the tranny. Should I be concerned that I'm not bringing the tranny up to proper temps 10x a week (to and from)...