Torson & Eaton type Differential Videos

[christover1]

https://youtu.be/JEiSTzK-A2A

[BZOOK]

Wow.

[christover1]

Wow.

I needed to research because I had no idea. There is a sticker on the diff thatt told me.

[christover1]

With guidance from Steve I found the difference between Torsen and Eaton styles.

https://youtu.be/lZmsY2YvVsc

https://youtu.be/JXtHM5-P0s0

[gwagensteve]

Just to clarify, it appears the “hybrid LSD” is an Eaton tru track unit with a viscous coupling installed between the side gears to preload the mechanism. Very Japanese. It’s obviously fairly effective and has few wear parts.

The tru-track unit responds well to a little equalisation between wheels- This is also the case with conventional clutch type LSD’s, so some use of the handbrake or left foot braking will assist- This is what the viscous coupling is designed to do- remove the need for driver input to make the LSD grab up.

They don’t “lock” though.

The Zexel-Torsen diff will lock if wheel loads are close to equal. This isn’t possible in most vehicles, so it acts like a regular LSD. However, in the Hummer (HMMWV) with powerful inboard brakes, an automatic, and high diff speed (due to portal gearing) they will lock very effectively. In the HMMWV, the “army approved” way of driving them in difficult terrain was to pull hard on the steering wheel and stand hard on both pedals. (!)

In a regular vehicle with no portals, wheel brakes and maybe a manual, using them like this will tend to break the LSD, as the drive gears are tiny, so in off road circles, the Torsen never caught on- the Eaton is the superior product.

[christover1]

Diff shaved from factory, is a nice touch.