I heard in the Forum that for the 4wd to kick in the rear wheels have to slip "1/8" What is "1/8"? Do you mean 1/8 ofr an inch, 1/8 of the circumfrence of the tire? Or 1/8 of something else?


CHRIS Please help me out

 

I believe its 1/8th rotation of the rear wheel.

PowerHungry
CR250 <-- Soon to be '00 Scrambler 400 4x4

 

does anyone know the exact meaning of 1/8?

 

Actually I believe it is 1/5 of a turn. From what I understand, that means when the rear wheels slip 1/5 of a total rotation the AWD system engages. Hope this helps.

 

clindst,

Exact fraction of rotation - couldn't tell ya. I can tell you the transition to 4WD is pretty seemless. Can't say as I really notice it kicking in most of the time. It is just there when you need it.

These days we need it a lot. Lots of snow and ice to lose traction on. I tow a hardwood pallet to groom the snowmobile trails and it gets pretty heavy as the snow builds up on top. The 4WD, and low range, are a must.

Why don't you drop the 96 Honda on a trailer and come up to play for a while? We'll experiment with the front wheel locking of the Sportsman and figure it out first hand. If you come via Detroit it is about 63 hours of driving, give or take.

You haven't had the full ATV experience until you've cruised in deep powder snow at -40! We'll have the wife join us with her snowmobile in case we bury the ATVs.

If you load and leave tonight we should see you by the weekend. How about it?

DJ

 

It is 1/5 of rotation of the rear to engage the front. AKA 20%. That also means that the front would be turning 20% slower than the back when to the fronts are being driven. Not all the machines are 20%, only the ones that are have tires of equal height front and back. My 335 and 250 has 23" in front and 24" in back and the fronts engage a tad sooner and the Scramblers have 22" in back and 23" in front and they engage a little later. This according to my dealer.

 

The fronts are suppose to kick in when the rears slip 1/5 of a wheel rotation.Just for the hell of it,I got on a real slippery[snowy]semi steep hill the other day.I proceeded in only 2wd on purpose.About 3/4 way up the hill I lost traction.I come to a complete stop,turned the AWD switch to on and give the quad some gas.I was watching the rears for wheel slippage.Very little wheel slippage was what I observed.And once the AWD did activate,it stood engaged completely to the top of the hill.I know I did'nt have rear wheel slippage completely up the hill to.So it is my assumtion that Polaris AWD system needs very little rear wheel slippage to activate and stay that way until not needed.=====BILL