are all 4L30E transmission alike? I may need one! seems to be alot out there in the salvage yards just here in Cincinnati; filling mine up this afternoon but I'm not hopefully as the last mile I drove home I had no torque; lower pan was a black mess, smelled bad, got it all out, no chunks of metal; yep, that 1.75 gallons I once put in didn't include taking down the main pan so I outta to be at 2 gallons pretty much; filling it up this afternoon when I get back from lunch; its ready, all pans are back up, new filter but I fear the worst!