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Sounds like something like Mobil ATF D/M is the solution then. Specs say: GM DEXRON® IIIH Ford MERCON® Allison C-4 It is also approved for Allison TES-389 (AA-32792008). Price is very reasonable too, which is fine with me. I had been eyeballing that fluid before my post but I didn't know if...

The hydraulic system ( 50 gallons - separate from transmission itself) uses AW-46 oil. That's already been changed. Transmission, axles and planetaries still are due. I'm surprised everyone is seemingly cavalier about the tranny fluid. I'd have expected more concern for something with a torque...

Hi guys, what is the current spec replacement for a Lull telehandler? It has a Funk 4 speed tranny, the data sheet on the machine calls for Allison C3 or MIL-L-2104. I'm confused as to what the current preferred fluid would be. The TO-4/TES-389/Transynd/Dexron alphabet soup makes one's head...