Just what the title says. My buddy has an older Griz, and my impression from watching him in the snow is that his front diff is an open design.

This guy got himself in trouble unlocked. What do you think: http://forums.atvconnection.com/intr...ggestions.html

 

In two wheel drive the rear is locked and dose not drive the front wheels at all, in four wheel drive the front will have only one wheel that will drive and the rear is locked, and in four lock both front and rear are locked.

 

So you have "3-wheel drive" in 4wd when the front diff is not locked....

 

Yes two in the back and one in the front

 

I think Suzuki, Yamaha, and Arctic Cat use a system that is pretty much the same. You have (as said above) 2wd, 4wd (open or limited), and 4wd locked. You just have to push an extra button to get the locked front diff. Simple, strong system.

 

Like all ATV without a locker system,thats why its a feature on most all ATVs now instead of a aftermarket system add on that you can add on later for $400 from High lifter.

Also on the 660 Griz the diff lock can only be engaged in low range,because true 4wd is hard to steer and unsafe at high speeds and is only used when the normal 3wd limited slip system just will not do the job for that short section.

 

I imagine the guy in the link above, didn't quite understand all this and that contributed to his crash!

 

I'm glad your buddy came out of it with only a bruise or two. A friend of mine almost died when his came over on top of him. Diff. lock is worth its weight in gold.