Quote:
Originally posted by soobiesvx93
Can someone explain what exactly binding is?
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On an all wheel drive car there is a division or split of power between the front and back wheels. As well as to the left and right sides of the car.
The TCU(transmission control unit) constantly adjusts the ratio from/of front to rear.
In NORMAL driving, smooth acceleration, strait and level roads, the power split is said to be 90 front/10 rear.
On wide open throttle (WOT), or on snow or ice, the TCU is said to evenaly split the power 50/50.
If the solenoid C sticks open, the car acts like a front wheel drive, and if it sticks shut, it acts like a "locked in four wheel drive.
If full pressure is given to the F/R clutch pack, the front and rear wheels have to turn at the same speed, not a problem going strait, but around a bend the arc of the front wheels is smaller than the arc of the rear wheels, causing a binding, or shudder.
ps; While driving around with a Subaru Select Moniter hooked up, most of the time the cars I have tested vary the ratios from 95% front in park, to 70-75%f "normal" driving, to an occasional 48%f on a snow power slide
Tom
pps; On the front differential there is nothing to modulate the left to right power split, it is controlled by the traction at the wheels/tires. On the rear, if the car has an open differential, like the front, the same holds true.
If however the car has a limited slip rear (or front) differential, there is a friction device limiting the speed differance of the left and right wheels.
This helps both rear, and at least one front tire get engine power.