****! Don't put Dextron in a diesel unless it's an old one like before 2005. They have such high rail pressure (30000 LB) You can damage the injectors. Besides I am a mechanic and i wouldn't use anything but Lucas or Power Service. Lucas makes a anti-algae product to dump in the tank. Just fill it with diesel and start it.
From Chevron Oil
Of course, it is not recommended that ATF be burned as fuel. Francis Healy of the Chevron Fuel Technology Team, says that "the root cause comes from blending ATF with ULSD" for lubricity reasons. According to Healy, the lack of lubricity found in early mixes of ULSD is no longer a problem, as fuel manufacturers now add necessary lubricants during refinement. As far as the long-term effects of running used ATF as fuel, Healy spoke on behalf of Chevron. "We (Chevron) can only speculate, but under higher fuel pressures (namely common-rail engines), the engine won't last, and can cause extreme wear on injection systems."