550

chucksoliver77 · Jun 13, 2015

Is GL5 80-90 wt. trans. oil okay for a 550? Thanks in advance, Chuck

SW3 · Jun 13, 2015

Been using it in mine for the past 10 years with no problems - NW Minnesota.

Farmritch · Jun 19, 2015

Not if there is any brass in there
More transmissions have been runined by putting GL-5 in than any abuse
GL-4 if there is brass

RiTch

chucksoliver77 · Jun 20, 2015

That's why I asked about the GL5 in a 550.

mr.precision · Jun 21, 2015

(quoted from post at 04:12:44 06/20/15)
Not if there is any brass in there
More transmissions have been runined by putting GL-5 in than any abuse
GL-4 if there is brass

RiTch

Only if there's water in the trans. Most modern GL5 oils are safe for brass components in older tractors. Have it in several 40's and 50's Olivers, John Deeres, Farmalls, Cletracs.
If you have water mixed with the trans fluid, drain and refill with cheap hydraulic fluid. Run the tractor around for a few minutes, drain and refill with the trans lube of your choice. You should be OK.

550

chucksoliver77

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SW3

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Farmritch

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chucksoliver77

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mr.precision

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