roalco, I would like, if I may, take advantage of your obvious knowledgeableness. Are you implying that the 4motion transmission is more reliable than the 4xmotion? -Personally, (my main experience/background is pre-90's Landcruisers, Unimogs, series Land Rovers, and Haflingers) I prefer the Torsen differential, it is extremely robust, extremely simple, has no friction surfaces to wear out and has no requirement for electricity to engage. My biggest wear concern with the Haldex clutch packs is that they are continuously active (ie. slipping) in order to provide AWD in regular (non-fully locked) operation, and, other than a full strip down and inspection, it is virtually impossible to ascertain how effective the clutch pack is at locking the differential, rather like the old limited slip differentials. Can I manually lock the center diff in the 4motion with the button (if indeed a button) on the left of the air-suspension height knob (drawing of the car with the center diff grayed out and "LOCK" underneath)? -No, google and read about Torsen differentials, they are always fully active, transferring power when a difference of torque transmission is sensed, not relative drive shaft motion. Underlying mechanics differences notwithstanding, are manually selectable options the same until 4xmotion is placed in low gearing? 4xmotion's left knob (off-road switch) goes: on road > off road > lock > ctr diff > rear diff. Are on road and off road the same for either transmission? All promotion mentions 5 positions for the off road system in 4xmotion. Does that mean there is a "low" position with open (unlocked) diff (otherwise there are actually only 4 positions/options for the off-road knob. Both versions are marketed as 8-speed auto. Does this mean that the 4xmotion uses the low gearing transfer to add 2 ratios to its 6-speed? I'll send you a Tylenol...
-In NA we are no longer offered the 4XMotion option on the new Touaregs, but basically your control knob translates as; all wheel drive high range, all wheel drive Low range, all wheel drive with fully locked center differential, and finally the addition of a fully locked rear differential, if fitted (a very uncommon, expensive option!) -I assume from your comments, that VW are now using the Aisun 8 speed transmission in both drive trains, (both single speed and two speed transfer case equipped, as mentioned previously). A great idea, and if they just dropped first gear down just a bit you would never the additional weight and complication of a two speed TC.
roalco, I would like, if I may, take advantage of your obvious knowledgeableness. Are you implying that the 4motion transmission is more reliable than the 4xmotion? -Personally, (my experience/background is pre-90's Landcruisers, Unimogs, series Land Rovers, and Haflingers) I prefer the Torsen differential, it is extremely robust, extremely simple, has no friction surfaces to wear out and has no requirement for electricity to engage. My biggest wear concern with the Haldex clutch packs is that they are continuously active (ie. slipping) in order to provide AWD in regular (non-fully locked) operation, and, other than a full strip down and inspection, it is virtually impossible to ascertain how effective the clutch pack is at locking the differential, rather like the old limited slip differentials. Can I manually lock the center diff in the 4motion with the button (if indeed a button) on the left of the air-suspension height knob (drawing of the car with the center diff grayed out and "LOCK" underneath)? -No, google and read about Torsen differentials, they are always fully active, transferring power when a difference of torque transmission is sensed, not relative drive shaft motion. Underlying mechanics differences notwithstanding, are manually selectable options the same until 4xmotion is placed in low gearing? 4xmotion's left knob (off-road switch) goes: on road > off road > lock > ctr diff > rear diff. Are on road and off road the same for either transmission? All promotion mentions 5 positions for the off road system in 4xmotion. Does that mean there is a "low" position with open (unlocked) diff (otherwise there are actually only 4 positions/options for the off-road knob. Both versions are marketed as 8-speed auto. Does this mean that the 4xmotion uses the low gearing transfer to add 2 ratios to its 6-speed? I'll send you a Tylenol...
-In NA we are no longer offered the 4XMotion option on the new Touaregs, but basically your control knob translates as; all wheel drive high range, all wheel drive Low range, all wheel drive with fully locked center differential, and finally the addition of a fully locked rear differential, if fitted (a very uncommon, expensive option!) -I assume from your comments, that VW are now using the Aisun 8 speed transmission in both drive trains. Good idea! -In the end, you have to decide what options you want, are willing to pay for, and maintain. Me, I've found the TDi 7P series Touraeg with 4Motion to be an exceptionally nimble and competent all weather, all condition vehicle, as capable, and far more comfortable than my other vehicles, in 99% of my driving requirements. Never forget, off road capability is mostly driver skill and experience, with suitable tires, a close second, and vehicle accoutrements a distant third. -In the end, you have to decide what options you want, are willing to pay for, and maintain. Me, I've found the TDi 7P series Touraeg with 4Motion to be an exceptionally nimble and competent all weather, all condition vehicle, as capable, and far more comfortable than my other vehicles, in 99% of my driving requirements. Never forget, off road capability is mostly driver skill and experience, with suitable tires, a close second, and vehicle accoutrements a distant third. Sorry, just saw some of my comments are co-mingled with your quotes... I have no idea how that happened, and don't have the the time or patience to rewrite. Hope you can decipher.