murdog

I have been having problems with my o.d. when my tranny fluid is cold. It will not shift completely into o.d. until it gets to about 85 or 90 degrees fluid temp. I can turn the o.d. off to warm the fluid faster but I would like to know if any of you all have ever heard of anything like this and what the problem is. I have an edge evolution programmer to monitor things and the tranny does not seem to be slippipng, it's more like it has a two stage o.d. Any thoughts are greatly appreciated.