Originally Posted By: Hokiefyd
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Although your wife's Pilot wasn't the subject of your thread, I feel compelled to recommend that you take it to the dealer; it sounds like something's amiss with the AWD system. It uses the VTM-4 system, which both proactively and reactively engages the rear wheels to assist with traction. There is also a VTM-4 lock button on the dash that would operate similar to a "4WD high" mode in a manual transfer case: it locks the rear wheels to the propeller shaft (which spins at transmission output speed). If these functions aren't working properly
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http://mypage.siu.edu/jeepster/vtm4.html
From the article:
"Cruise or Coast: When in cruise or coast mode, the VTM-4 reduces the torque transfer to the rear wheels to zero in order to improve fuel efficiency and driveability. "
" Mechanical Testing:
2WD: In 2WD, the clutches are NOT engaged and each wheel should spin freely by hand while on jack stands.
4WD: When activated, the electro-magnetic coils in the VTM-4 force the ramps in the thrust plate and pole piece to separate with considerable force when the wheel or ring gear carrier is rotated."
The Pilot is a 2WD vehicle unless it determines slippage then engages the rear wheels. Unless I engage the Vlock button that locks the rear but that is only available up to 12mph then it automatically disengages. Another words only useful when you are stuck and not for actual driving. This has been experienced when driving. Regarding the tires traction, I will hold comment until I replace them with something I am more familiar with (I generally prefer Continental or Yokohama cross-terrains).
I do not know what the Durango AWD system has, I could not find any information regarding it.
The 4Runner Limited is the only 4Runner model that has an AWD system (with locking diff), the SR5 and Trail are equipped with part-time 4WD traditional system.
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http://en.wikipedia.org/wiki/Torsen
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http://www.motortrend.com/features/consumer/1105_4wd_vs_awd/viewall.html