transmission additive fo international 300 utility tractor

[Cass Toon]

I just purchased this tractor and an Operator's Manual. For the transmission it says to use one quart IH Torque Amplifier Transmission Lubricant Additive to each of four gallons of SAE 10 or SAE 10W engine oil. Where do I get IH Torque Amplifier Transmission Lubricant Additive or is there an acceptable substitute?

 

[RickB]

Those specifications have been obsolete since the introduction of HyTran hydraulic oil about 50 years ago. Use CaseIH Hytran Ultra oil, New Holland MasterTran oil, or an oil meeting the HyTran spec.