Part-Time v.s. Full-Time

From: fawcett@uism.bu.edu
Date: Wed Sep 23 1998 - 10:34:44 EDT


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     Wooahh Brian!
     
     I admit it seems counterintuitive, but you've got this backwards...
     Part-Time 4WD is for use ONLY on loose surfaces (read the warning on
     the drivers side visor) the Full-Time option can be used on any road
     surface...
     
     The part-time system is the generic 4WD system on our vehicles and is
     not a new invention.
     
     T.
     
     <<Durango Transfer Case:
     2H - normal driving
     4 PT - it is PART-TIME!!!!! only engages when there is slippage at
     rear, turns off when turning a corner, too
     4 FT - same as 4 high in anything else - it's in 4 wheel drive all the
     time
     N - makes everything shift into neutral
     4L - low range gearing
     
     Leaving it in 4FT is only for dirt roads, heavy snow....4 PT is for
     rain, light snow.....Having full-time 4 wheel drive or just 4 wheel
     drive(Selec-Trac in a Jeep) wears out stuff(u-joints, driveline, etc.)
     a lot faster. Wastes gas, and os overall less efficient, especially
     if it is only needed once in a while.
     
     If you use 4FT on the street, it will wear out everything faster.
     It's bad for it, too. That's why 4 PT was invented. You can drive at
     higher speeds without damaging stuff, too.
     
     Brian>>



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