1998 Ranger axle oil updated to 75W-140?

[Jay11]

1998 2.5 2WD XLT STD Cab 130k miles
Have driven this lil'capo since 69k miles. Pulled the axle plug out and found still very clean oil. Question is should I still change it considering the miles & age?
In the past while cursory browsing had seen something about an updated Ford bulletin that called for 75W140 synthetic on some older Ford autos. Can somebody confirm that that is good on the this truck?
Found a $9.89 deal at Tractor Supply here.

 

[lil_Blue_Ford]

I haven’t heard anything about an update to the gear oil. I do know that the 2002 Explorers have it marked on the rear differential cover to use 75-140 synthetic only, but that’s also an IFS rear.

I’ve usually used regular gear oil because I buy it in 5-gal buckets. My F-150 and green Ranger I used 75-140 because I planned to work them hard. I’m also inclined to use synthetic of some flavor in the front axle on the 98-11 trucks just because it’s not easy to service.

 

[SenorNoob]

The 01 Explorer sport straight axle had tag for 75-140 too. AFAIK, it's a standard 8.8. I see no reason not to use that fluid in pretty much everything. (Only stocking one fluid is nice.)