Originally Posted by
mk6wrx
I have got in contact with the company that makes those transfere boxes today and they can build one with a slipper diff inside, they are getting back to me with the exact spec, so do most 4wd cars use a slipper diff?
How does the slipper diff actually work?
If a centre diff was an open diff would the front 2 wheels just spin if they were on an ice patch etc?
Yes, if the diff was open, and the front wheels spun on ice, there would be no drive to the rear.
The slipper diff allows the axles to turn at slightly different speeds for corners without winding up, but still provides drive to the other axle if one has no grip.
The best combination would probably be slipper centre and rear, with open front, as it will give more predictable handling.
The torque split front to rear will really depend on how much is available from the engine. The front will reach its limit before the rear, so if you have lots of torque, then you may have to bias it to the rear to make the car driveable. The rear bias will tend to encourage power oversteer.