I'm looking for a TCH equivalent to use in my 580CK backhoe/loader. The issue is the torque converter and hydraulic shuttle-shift. It has universal tractor fluid in it now (Deere HyGuard as I recall). I'm guessing it's too thick. Deere standard Hyguard is 20W. Works fine in temps above 40 degrees F. If colder, it barely moves until the oil gets warmed up. This morning it as 22 F and it would not move at all until it ran for 15 minutes.
I realize that Case-IH now sell Hytran Ultra as the TCH replacement. I'm must wondering if I can buy something local, like Dexron ATF, Type A auto trans oil, or Donax maybe? Or perhaps Deere Hyguard winter-grade?