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  1. The modern iteration of "EP" is GL5. Use GL5 in the rear end. Use GL4, or one of the specialty manual tranny lubes in the tranmission. Redline MT 90 is one of these.
    bobistheoilguy.com/forums/threads/ep-90-vs-80w-9…
    My recommendation will be a GL-5 gear oil, in a viscosity similar to, or weather permitting, to whatever was recommended back then. I don't recommend LS additives or gear oils with LS additives, unless equipped with an LS diff that requires it.
    bobistheoilguy.com/forums/threads/gear-oil-vs-hyp…
    The spec'ed pre-2000 SAE EP 90 was split into two categories of :- a) Current day J306 SAE EP 90, equivalent to AGMA 4EP gear oil or ISO 150 gear oil,and b) Current day J306 SAE EP 110, equivalent to AGMA 5EP gear oil or ISO 220 gear oil.
    bobistheoilguy.com/forums/threads/can-use-this-in…
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  3. Can use this instead of EP90 | BobIsTheOilGuy

    Oct 22, 2015 · For some reason nobody seems to sell EP90 Hypoid gear oil around my area, not even online from oustide the Island in mainland Spain. a new Shell station just opened up nearby me and they have this : Shell Spirax by …

  4. Alternatives to SAE 90 gear oil? | BobIsTheOilGuy

  5. Is EP 90 the same/ similar as 80w 90? - The Farming Forum

  6. 85W-140 vs. SAE 90 gear oil | Yesterday's Tractors Forums

  7. 75w90 vs 80w90 Gear Oil: Major 6 Differences - MrOilGuy

    Nov 5, 2023 · 75w90 gear oil is entirely synthetic, providing superior lubrication and protection under extreme pressure conditions. It is ideal for heavy-duty manual transmissions, limited-slip differentials, and railway gearboxes. Then …

  8. The Ultimate Industrial Gear Oil Selection Guide

    Feb 1, 2024 · It’s North American equivalent is AGMA 5 R&O gear oil, or AGMA 5EP Extreme Pressure gear oil. Most modern SAE 90 gear industrial oil misses the KV@40 o C by a small margin, but it is close enough; you need it …

  9. Gearbox Lube 80-90W EP vs SAE 80W90 - OrangeTractorTalks

  10. Sae 90 Ep Gear Oil Equivalent - Homey Gears

  11. "gear oil" Vs "hypoid/EP gear oil" - Bob is the Oil Guy