Hi there,(adsbygoogle = window.adsbygoogle || []).push({});

I'm currently doing some research into differentials and have been unable to find any indepth information on them. Every article I read covers the basics that one axle turns one direction relative to the diff casing and the other in the opposite direction so that the average of the 2 is always the casing speed.

However, I'm looking for some detail on the bevel gears inside the differential, and the effect that their gear ratio (between the planet bevel gears and sun bevel gears) has on the operation of the diff. This is with regards to a simple open diff, with 4 bevel gears on the interior of the differential.

I would also like to know the advantages of using 4 planet gears instead of just 2 (I have taken apart 2 differentials and one of them used 2 planet gears and one used 4).

I am not, I repeat,am nottalking about the pinion and crown wheel, I know what effect that has!

Thanks for reading,

Phil

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Automotive Automotive differential problem

**Physics Forums | Science Articles, Homework Help, Discussion**