what is traction ?




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© 1996-2012 Harald Pietschmann


Four wheel drive systems

"All Wheel Drive"

All Wheel Drive or AWD - full time symmetric AWD
not to be confused with automatic asymmetric AWD
Only mode in AWD is 4WD. Full time.

No 2WD available.

No 4WD "low" available.


AWD is almost useless beyond pavement.


transfer case and center differential

two drive shafts

two axle differentials

two powered axles

what is the difference between AWD and full time 4WD?

what other 4x4 systems are available?

how 2WD uses traction : how 4WD uses traction : 4WD layouts
crawl ratio
: 4WD components

Learn from professionals to get the most from your 4WD truck:

2013 hands-on 4WD courses