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Posted by Vaughn [] on Friday, January 22, 2021 at 10:05:15 :

In Reply to: Gear oil used in the differential? posted by AVaughn [] on Thursday, January 21, 2021 at 20:22:13 :

Exert from the Military Specification MIL-L-2105D dated 8-7-87 for Lubrication oil, Gear, Multipurpose for the following grades: 75W – GO-75, 80W-90 – GO 80W/90, 85W-140 – GO 85W/140.

- COMPATIBILITY – compatibility with other gear oils,

- MOISTURE CORROSION – prevent or minimize corrosion to gear components in the present of moisture,

- THERMAL OXIDATION STABILITY – oil shall resist chemical and thermal oxidation,

- LOAD CARRYING, EXTREME PRESSURE AND DEPOSIT CHARACTERISTIC – oil shall prevent or minimize gear distress and lubricant deposits,

- GEAR SCORING – oil shall minimize gear scoring,

- GEAR DISTRESS AND DEPOSITS – oil shall prevent gear tooth ridging, rippling, pitting, welding and excessive wear and does not produce excessive wear, pitting or corrosion of bearing rollers, races, or thrust washers.

- COPPER CORROSION – oil shall minimize copper corrosion.

When looking for gear oil, look for the above standards as a guide in choosing a gear oil.

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