THE BEST gearbox fluid for your 7.3 Powerstroke !! (Stubborn drain plug!)

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I highly recommend 80-90 weight especially with your case with it shifting hard and if it’s making sounds from the trans 80-90 weight is the way to go.

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Ive heard gear oil is real bad for these

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This 30 weight is doing nice improving everyday

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@@TENMILSOCKETGARAGE we run it in our zf6 7.3 and it keep it quiet and shifts like a dream

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@@605_ACE ill give it a shot someday 😎

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@@TENMILSOCKETGARAGE go for it, we have had nothing but good with the 80-90