I recently retired from a Case dealer with whom I have spent my whole working career(52 yrs). I have seen more damaged components, seals swelled up in hydraulic cylinders, excessive gear wear, excessive noise in geartrains,and many other oil related issues. Without going into specifics I was personally threatened with a lawsuit for recommending only Case products as several bought a brand popular here in Pa. that swelled the packings in our 580 series hoes so they had to be put on our rollback and pulled apart with a winch.
I fully expect to get flamed for this post but you asked, Being unsure of the quality and the meeting of Case's specs in the hydraulic clutch power shuttle and seeing that that oil bathes the brakes and lubes the bearings and gears as well as filling the torque converter, I cannot recommend any substitute with the xception of one. Right now there is discussion on YTmag's site about suspicion of shortline oils breaking down the adhesive in PTO clutch discs and pictures of a suction screen virtually plugged with seperated lining material.
In short, If I were running a later Case piece of equipment I would use nothing but Hy Tran Ultra. It cost one man on the Case forum thousands to have every lined disc in his 1370 ag tractor replaced from running a cheap oil. I could buy a lot of Hy Tran for what his repair cost. FWIW, I also believe HY Gard by JD to be a quality oil.
OK guys, no piling on now
Mel