now if they'd loose a little bit of weight ,

 

if you have different size tires then they will need to spin at different speeds to cover the same amount of ground.

BTW you must be really strong to hold that 4 wheeler back like that....

 

LOL! I had the plow blade on and up against the bumper of my car, just can't see that in the video. And the tires were spinning very easily on the ice.

As far as ADC goes, it has nothing to do with rear wheel speed or available traction. When the switch is in the AWD position, power is sent to the AWD coil AND ADC coil. AWD will be activated when the rear wheels lose traction. ADC will be activated if and only when (1) the throttle is closed AND (2) the speed is less than 15 mph AND (3) the transmission is in H,L, or R. The ECU grounds the ADC coil when all three of sensors say YES basically, and the front diff then locks up. The ADC system doesn't care about anything else. It will stay locked up until one or more of the three sensors report a change, or the switch is moved to 2X4.

I might have to take other videos to support my argument, but not today. I'll need to get on one of the local hilly paved roads in order to do this.

 

i think your doing a damn good job in your description and your videos. thanks for sharing.

 

<div class="FTQUOTE"><begin quote>Originally posted by: sheepdogMSP8117

LOL! I had the plow blade on and up against the bumper of my car, just can't see that in the video. And the tires were spinning very easily on the ice.

haha, i thought youd like that one. thanks for the info....

 

Pic are worth it. Hard to describe unless you see it. Good Job. Three Baa, baa, baa's to you.

 

Thanks for the vids....truly helps to see it. Definitely have a better understanding now. [img]i/expressions/beer.gif[/img]

 

Having given the AWD design a lot of research and thought, I will have to edit the description in my video and correct myself in this forum regarding forcing the AWD system to lock up. I thought the AWD system could be forced to lock up under really good traction and cause the AWD system excess strain. Rick said something about if the ground/road forced the front wheels to the same speed as the rear, the AWD system would overrun and revert to 2X4. He was correct.

However, regarding Ricks statement: "The ADC works the same way but oppisite, as the rear starts to slip the front engages and slows you, but as the rear gains traction the front then disengages and easy steering. The 4WD and ADC are not on all the time, just when extra traction is needed. Thats why the gearing is differant front to rear to overide the AWD/ADC systems."

ADC does not does not work the same way as AWD. Rather it works independently, and is activated by clutch packs, not rollers as with AWD.

The AWD system operates the same way regardless of speed. Whereas ADC is only operates when under 15 mph AND the throttle is closed AND the tranmission is in gear AND the switch is ithe AWD position. Traction is not a factor in determining if the ADC system turns itself on or off.

And the AWD system will only engage if the rear wheels turn FASTER than the front, but not slower. EBS will result in the rear wheels skidding/slipping while going down a sand hill for example, but that doesn't make the front engage. Its the ADC system that makes the front engage. If it was true that the fronts engage and slow you down when the rear starts to slip, then there wouldn't be a need for ADC.

I'll make the edits that I said I would.

 

I posted this on your ADC on/off switch post.

I'm going to research this a little more and let you know what I find out. I have a new ADC front diff coming I can easily hook power up and see how it works.

I have EBS on my Srambler and I can wedge the front diff and decend steep hills but it is very hard to steer when it's wedged.
My X2 will steer easy if its not sliding.

I found this, don't know how accureate it may be:

There is a electromagnetic coil on the pinion that causes an armature plate splined to the pinion shaft to be attracted to a lobed plate. The lobed plate then runs at pinion speed. The lobe plate rotates and powers a small hydraulic pump that applies pressure to a piston that surrounds one of the output shafts. This piston presses against a muli-plate clutch. The clutch locks the two axle shfts together and locks the spool with the over running rollers to the output shaft. Since the front axle wants to run slightly faster than the rear, this causes the over running rollers to lock to the ring gear.

So if both front and rear have traction and are turning the same speed the over ride clutch should release, although the ADC pump is applying presure and locking the axles together, correct?

 

nice video