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Diff gears
Posted: 19 Sep 2023 19:56
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?
Thanks,
D.
Re: Diff gears
Posted: 19 Sep 2023 20:25
by mvcoller
All modern vehicle diffs have hypoid gears....
Re: Diff gears
Posted: 20 Sep 2023 17:25
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?
Re: Diff gears
Posted: 20 Sep 2023 19:31
by SJC
Correct diff oil would be: epx api gl5 80w90

Re: Diff gears
Posted: 20 Sep 2023 21:13
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.
Re: Diff gears
Posted: 21 Sep 2023 05:38
by Peter Connan
SJC wrote: ↑20 Sep 2023 19:31
Correct diff oil would be: epx api gl5 80w90
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.