One question on the ATF.  What brand did you use?  Was it synthetic?
Here in Austin, Texas we've seen +115*, but never -15*.



Hi Mark;
No it wasn't synthetic but I did consider it as the viscosity will change
less with temperature fluctuations. However I decided that one of the big
advantages to ATF was that it was cheap and easy to get and felt that
synthetic would diminish that advantage somewhat. So when the viscosity
proved to be unsuitable for our winter temps, I figured if I was going to
pay more, I might as well stop experimenting and just use DOT5 as there
really was no advantage to continue pissing around with ATF.
It may be more suitable in your environment, but this was my experience.
Hope this helps

Todd