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yamaha sport sxs rumor

I think with the rekluse clutch option it may be kinda like rockcrawling in a full size rig with a automatic trans. it also has a full locking front diff
 
So does a rzr. I will stick with the belt that I can change in 5 mins compared to a dnf because of a smoked clutch stack.
 
"The Hilliard system in the front of both Rangers and RZRs is an electro-mechanical system, several things have to happen for the front to begin putting power to the ground. And for the record when the Hilliard system is engaged and working properly it is a locked system (both front wheels will turn/spin at the same speed). To get the front to engage you need the following: The AWD switch must be turned on, the engine rpm must be below around 3200, the rear wheels must be turning faster than the front wheels, as designed if all the above conditions are met, after approximately 1/5 of a revolution of the rear wheels the front will engage and begin turning under power. Both front wheels should be truning at the same speed - if not something is broken, could be external to the front diff - an axle or internal to the diff - the sprague carrier or some other internal part.

The reason Polaris went with the Hilliard system is that it is an on demand system in that it only turns on when needed and turns off as soon as the need goes away. This allows for a locked front drive when needed and when not needed for the driver to be able to steer the vehicle with relative ease. "

Spend a little time and do a search on the forum, you will find tons of information on the front differential.

Basically it is an "overrunning differential". What that means is that the front differential is actually turning a little faster than the rear differential. When the rear wheels lose traction and the wheels spin, the rear differential is spinning faster and catches up to the speed of the front differential.

When that happens the rollers in the sprague, in the front diff, become wedged between the ring gear and the output hubs and the front wheels begin to turn, providing traction. As soon as the front gains traction and pulls the rear wheels to where they get traction, the spin of the front driveshaft slows and the sprague rollers become "unwedged" and the front wheels stop pulling.

You can do a search on Hilliard differential and get some good pics of what things look like, but Hilliard does not provide much info on how it works. We've all learned by testing and by reading here on the forum.

Turning on the AWD switch simply applies current to a coil which the creates a magnetic field on the armature in the front diff, which then creates drag on the sprague and its rollerss, positioning them to lock up when the rear wheels lose traction."
 
There are folks working on lower gears for the trans already. There are reduction gears on the input and output of the trans as well, so future aftermarket offerings may offer something there.

Here's the current gear ratios-

Transmission gear ratios

1st- 2.059
2nd- 1.545
3rd- 1.192
4th- .962
5th- .806

Transmission output reduction.

1.660

Transmission input reduction

1.864

Axle ratio

3.666
 

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