Diff gears

Transmissions, Transfer Boxes, Axles, Drive Shafts
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Witbobbejaan
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Diff gears

Post by Witbobbejaan »

Good evening Patrol Gurus...hope everyone is doing something on their cars or planning a trip!!

Question: Which models have hypoid gears in the differentials?

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Re: Diff gears

Post by mvcoller »

All modern vehicle diffs have hypoid gears....
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Re: Diff gears

Post by Witbobbejaan »

Great, thanks!

So presumably any transaxle oil will be compatible? some state hypoid, others not,so I always wonder...

Are there any other parts of the drivetrain with hypoid gears?
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Re: Diff gears

Post by SJC »

Correct diff oil would be: epx api gl5 80w90 :mytwocents:
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Re: Diff gears

Post by mvcoller »

Witbobbejaan wrote: 20 Sep 2023 17:25
Are there any other parts of the drivetrain with hypoid gears?
noun: hypoid gear
a bevel wheel with teeth engaging with a spiral pinion mounted at right angles to the wheel's axis, used to connect non-intersecting shafts in vehicle transmissions and other mechanisms.

Other than maybe on some 4x4 vehicles with portal axles, I know of nothing else that does, off hand

These gears generate extreme pressure on their teeth surfaces, hence the need for EP (Extreme Pressure) oil.
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Re: Diff gears

Post by Peter Connan »

SJC wrote: 20 Sep 2023 19:31 Correct diff oil would be: epx api gl5 80w90 :mytwocents:
Note that the "EPX" stands for extreme pressure.
This is specifically for hypoid gears.

Thus EPX and Hypoid are sinonyms in terms of the oil.
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