I will be switching over from my stock 2 row rad to a griffin universal fit radiator. The new radiator doesn't have the internal trans cooler so I am now starting to worry about how I will cool my TH400 with 2800 12" stall. I currently have a 11"x6"x1.5" external cooler mounted in front of the rad but I don't know if it will be enough. will it? if not, what do I need to do to keep the heat down in my trans? I think the cooler is from B&M and is rated at 24,000 GVW.

HiYa

If your external 24K is a stacked plate and not that finned garbage you will probably make it. Where you live it's a dab cooler temp wise BUT a temp gauge is always a good idea. My 200 trannie shifts perfect at 160º here in the low desert.

Jim