To those running a gear drive unit. I recently swapped my 5.5 belt drive for a 8 gear drive and not sure what gear oil to use in the gear box. Anyone know what should be used?
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What hp engine are you running it with?
How do you like it so far? Psi?
I was told 90w by Russ Johnson… but I haven’t changed mine yet.
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It’s a Honda GX690 so 22hp I believe. 3500psi. Haven’t used it but a couple of times since I got it but so far I’m loving it. Huge difference over my 5.5 on flatwork.
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90 Gear Lube.
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Udor specifies 90 wt gear oil.
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Now I have a question. Udor specifies 90w gear oil. What I find in stores is 75-90w, 80-90w, and 85-90w. Also I see the options of Hypoid and Synthetic. Are these acceptable? Thanks!
Obviously I don’t know the answer to that so I will be interested in the answer as well.
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J.N. Equipment sells Chevron’s RPM 80-90w oil for use in gear drive units. Apparently it 8s gl4 and gl5 compliant and is Hypoid compatible also.
I wouldn’t overthink it as long as it’s an SAE 90 weight lube. GL-4 or 5, synthetic, hypoid, etc shouldn’t matter as these boxes are spur or helical gears operating at much lower pressures than an automobile tranny or differential. It’s not like this is going into a $5k Allison!
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