mguitas
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Changing my oil in front axel, they want sae80 gl-4, but could i use 80w90 gear oil? Thanks.
sae80 gear oil
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Diamondpilot
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80W90 is just fine.
Chris
Chris
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mguitas
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Thanks for the info, i put in 80w90 GL-5. It calls for GL-4. I hope that don't matter to much.
Foxtrot08
Silver Member
There is actually a patent on the additive for gear oil - so no matter the brand, they're all pretty much made to the same specs. Finding straight weight gear oils in little amounts is pretty hard. I know I looked for my ATV's and just ended up using 80w90. As said above, any of them will work, 80w90 is probably the best price too.
Soundguy
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i'd also imagine the 80w90 is fine. book may be older spec and why it says gl4, back when they were writing up for tht axle..e tc. then n the data just got perpetuated instead of updated.
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mguitas
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Thanks soundguy,the 1423 is 12 years old.
Z71
Gold Member
API Category GL-4 designates the type of service characteristic of spiral-bevel and hypoid gears in automotive axles operated under moderate speeds and loads. These oils may be used in selected manual transmission and transaxle applications.
API Category GL-5 designates the type of service characteristic of gears, particularly hypoids in automotive axles under high-speed and/or low-speed, high-torque conditions. Lubricants qualified under U.S. Military specification MIL-L-2105D (formerly MIL-L-2015C), MIL-PRF-2105E and SAE J2360 satisfy the requirements of the API GL-5 service designation.
As long as the GL-5 gear lube oil also says GL4 on the label its ok to use in GL-4 applications. In the past some equipment required GL-4 because GL-5 EP additves was not freindly to yellow metals used in the GL-4 spec'd gear case. The viscosity in not as important, single weight viscosities are a think of the past as most modern equipment spec's multi-visosity, e.g. 75W-90.
API Category GL-5 designates the type of service characteristic of gears, particularly hypoids in automotive axles under high-speed and/or low-speed, high-torque conditions. Lubricants qualified under U.S. Military specification MIL-L-2105D (formerly MIL-L-2015C), MIL-PRF-2105E and SAE J2360 satisfy the requirements of the API GL-5 service designation.
As long as the GL-5 gear lube oil also says GL4 on the label its ok to use in GL-4 applications. In the past some equipment required GL-4 because GL-5 EP additves was not freindly to yellow metals used in the GL-4 spec'd gear case. The viscosity in not as important, single weight viscosities are a think of the past as most modern equipment spec's multi-visosity, e.g. 75W-90.
